[
  {
    "name": "Hydrogen",
    "atomic_mass": 1.008,
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    "symbol": "H",
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    "electron_affinity": 72.769,
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    "ionization_energies": [
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  },
  {
    "name": "Helium",
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    "symbol": "He",
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      2
    ],
    "electron_affinity": -48,
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    "ionization_energies": [
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    ]
  },
  {
    "name": "Lithium",
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    "phase": "Solid",
    "symbol": "Li",
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      1
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  },
  {
    "name": "Beryllium",
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    "symbol": "Be",
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      2,
      2
    ],
    "electron_affinity": -48,
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    "ionization_energies": [
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    ]
  },
  {
    "name": "Boron",
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      3
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    "electron_affinity": 26.989,
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    "ionization_energies": [
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  },
  {
    "name": "Carbon",
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    "symbol": "C",
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      4
    ],
    "electron_affinity": 121.7763,
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  },
  {
    "name": "Nitrogen",
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      2,
      5
    ],
    "electron_affinity": -6.8,
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    "ionization_energies": [
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  },
  {
    "name": "Oxygen",
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      2,
      6
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    "electron_affinity": 140.976,
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    "ionization_energies": [
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  },
  {
    "name": "Fluorine",
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      7
    ],
    "electron_affinity": 328.1649,
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    "ionization_energies": [
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    ]
  },
  {
    "name": "Neon",
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      2,
      8
    ],
    "electron_affinity": -116,
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    "ionization_energies": [
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      115379.5,
      131432
    ]
  },
  {
    "name": "Sodium",
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    "symbol": "Na",
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      8,
      1
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    "electron_affinity": 52.867,
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    "ionization_energies": [
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  },
  {
    "name": "Magnesium",
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    "symbol": "Mg",
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      8,
      2
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    "electron_affinity": -40,
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    "ionization_energies": [
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  },
  {
    "name": "Aluminium",
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    "symbol": "Al",
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      2,
      8,
      3
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    "electron_affinity": 41.762,
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    "ionization_energies": [
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  },
  {
    "name": "Silicon",
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    "symbol": "Si",
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      8,
      4
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    "electron_affinity": 134.0684,
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    "ionization_energies": [
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  },
  {
    "name": "Phosphorus",
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    "symbol": "P",
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      8,
      5
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    "electron_affinity": 72.037,
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    "ionization_energies": [
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  {
    "name": "Sulfur",
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    "symbol": "S",
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      6
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    "electron_affinity": 200.4101,
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    "ionization_energies": [
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  },
  {
    "name": "Chlorine",
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      8,
      7
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    "ionization_energies": [
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  },
  {
    "name": "Argon",
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      8
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  },
  {
    "name": "Potassium",
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      8,
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    "electron_affinity": 48.383,
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    "name": "Calcium",
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      2
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  {
    "name": "Scandium",
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    "ionization_energies": [
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    "name": "Titanium",
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    "symbol": "Ti",
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      10,
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    "ionization_energies": [
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  {
    "name": "Vanadium",
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    "symbol": "V",
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    "ionization_energies": [
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  {
    "name": "Chromium",
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    "symbol": "Cr",
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      1
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    "ionization_energies": [
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  },
  {
    "name": "Manganese",
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      8,
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      2
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    "ionization_energies": [
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  {
    "name": "Iron",
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    "symbol": "Fe",
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      14,
      2
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    "ionization_energies": [
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      163000,
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  {
    "name": "Cobalt",
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    "symbol": "Co",
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      15,
      2
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    "ionization_energies": [
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      966023
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  },
  {
    "name": "Nickel",
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      2
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    "ionization_energies": [
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  },
  {
    "name": "Copper",
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    "symbol": "Cu",
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      18,
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    "ionization_energies": [
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    "name": "Zinc",
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      2
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    "name": "Gallium",
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    "phase": "Solid",
    "symbol": "Ga",
    "shells": [
      2,
      8,
      18,
      3
    ],
    "electron_affinity": 41,
    "electronegativity": 1.81,
    "ionization_energies": [
      578.8,
      1979.3,
      2963,
      6180
    ]
  },
  {
    "name": "Germanium",
    "atomic_mass": 72.6308,
    "boiling_point": 3106,
    "density": 5.323,
    "melting_point": 1211.4,
    "molar_heat": 23.222,
    "number": 32,
    "phase": "Solid",
    "symbol": "Ge",
    "shells": [
      2,
      8,
      18,
      4
    ],
    "electron_affinity": 118.9352,
    "electronegativity": 2.01,
    "ionization_energies": [
      762,
      1537.5,
      3302.1,
      4411,
      9020
    ]
  },
  {
    "name": "Arsenic",
    "atomic_mass": 74.9215956,
    "boiling_point": null,
    "density": 5.727,
    "melting_point": null,
    "molar_heat": 24.64,
    "number": 33,
    "phase": "Solid",
    "symbol": "As",
    "shells": [
      2,
      8,
      18,
      5
    ],
    "electron_affinity": 77.65,
    "electronegativity": 2.18,
    "ionization_energies": [
      947,
      1798,
      2735,
      4837,
      6043,
      12310
    ]
  },
  {
    "name": "Selenium",
    "atomic_mass": 78.9718,
    "boiling_point": 958,
    "density": 4.81,
    "melting_point": 494,
    "molar_heat": 25.363,
    "number": 34,
    "phase": "Solid",
    "symbol": "Se",
    "shells": [
      2,
      8,
      18,
      6
    ],
    "electron_affinity": 194.9587,
    "electronegativity": 2.55,
    "ionization_energies": [
      941,
      2045,
      2973.7,
      4144,
      6590,
      7880,
      14990
    ]
  },
  {
    "name": "Bromine",
    "atomic_mass": 79.904,
    "boiling_point": 332,
    "density": 3.1028,
    "melting_point": 265.8,
    "molar_heat": null,
    "number": 35,
    "phase": "Liquid",
    "symbol": "Br",
    "shells": [
      2,
      8,
      18,
      7
    ],
    "electron_affinity": 324.537,
    "electronegativity": 2.96,
    "ionization_energies": [
      1139.9,
      2103,
      3470,
      4560,
      5760,
      8550,
      9940,
      18600
    ]
  },
  {
    "name": "Krypton",
    "atomic_mass": 83.7982,
    "boiling_point": 119.93,
    "density": 3.749,
    "melting_point": 115.78,
    "molar_heat": null,
    "number": 36,
    "phase": "Gas",
    "symbol": "Kr",
    "shells": [
      2,
      8,
      18,
      8
    ],
    "electron_affinity": -96,
    "electronegativity": 3,
    "ionization_energies": [
      1350.8,
      2350.4,
      3565,
      5070,
      6240,
      7570,
      10710,
      12138,
      22274,
      25880,
      29700,
      33800,
      37700,
      43100,
      47500,
      52200,
      57100,
      61800,
      75800,
      80400,
      85300,
      90400,
      96300,
      101400,
      111100,
      116290,
      282500,
      296200,
      311400,
      326200
    ]
  },
  {
    "name": "Rubidium",
    "atomic_mass": 85.46783,
    "boiling_point": 961,
    "density": 1.532,
    "melting_point": 312.45,
    "molar_heat": 31.06,
    "number": 37,
    "phase": "Solid",
    "symbol": "Rb",
    "shells": [
      2,
      8,
      18,
      8,
      1
    ],
    "electron_affinity": 46.884,
    "electronegativity": 0.82,
    "ionization_energies": [
      403,
      2633,
      3860,
      5080,
      6850,
      8140,
      9570,
      13120,
      14500,
      26740
    ]
  },
  {
    "name": "Strontium",
    "atomic_mass": 87.621,
    "boiling_point": 1650,
    "density": 2.64,
    "melting_point": 1050,
    "molar_heat": 26.4,
    "number": 38,
    "phase": "Solid",
    "symbol": "Sr",
    "shells": [
      2,
      8,
      18,
      8,
      2
    ],
    "electron_affinity": 5.023,
    "electronegativity": 0.95,
    "ionization_energies": [
      549.5,
      1064.2,
      4138,
      5500,
      6910,
      8760,
      10230,
      11800,
      15600,
      17100,
      31270
    ]
  },
  {
    "name": "Yttrium",
    "atomic_mass": 88.905842,
    "boiling_point": 3203,
    "density": 4.472,
    "melting_point": 1799,
    "molar_heat": 26.53,
    "number": 39,
    "phase": "Solid",
    "symbol": "Y",
    "shells": [
      2,
      8,
      18,
      9,
      2
    ],
    "electron_affinity": 29.6,
    "electronegativity": 1.22,
    "ionization_energies": [
      600,
      1180,
      1980,
      5847,
      7430,
      8970,
      11190,
      12450,
      14110,
      18400,
      19900,
      36090
    ]
  },
  {
    "name": "Zirconium",
    "atomic_mass": 91.2242,
    "boiling_point": 4650,
    "density": 6.52,
    "melting_point": 2128,
    "molar_heat": 25.36,
    "number": 40,
    "phase": "Solid",
    "symbol": "Zr",
    "shells": [
      2,
      8,
      18,
      10,
      2
    ],
    "electron_affinity": 41.806,
    "electronegativity": 1.33,
    "ionization_energies": [
      640.1,
      1270,
      2218,
      3313,
      7752,
      9500
    ]
  },
  {
    "name": "Niobium",
    "atomic_mass": 92.906372,
    "boiling_point": 5017,
    "density": 8.57,
    "melting_point": 2750,
    "molar_heat": 24.6,
    "number": 41,
    "phase": "Solid",
    "symbol": "Nb",
    "shells": [
      2,
      8,
      18,
      12,
      1
    ],
    "electron_affinity": 88.516,
    "electronegativity": 1.6,
    "ionization_energies": [
      652.1,
      1380,
      2416,
      3700,
      4877,
      9847,
      12100
    ]
  },
  {
    "name": "Molybdenum",
    "atomic_mass": 95.951,
    "boiling_point": 4912,
    "density": 10.28,
    "melting_point": 2896,
    "molar_heat": 24.06,
    "number": 42,
    "phase": "Solid",
    "symbol": "Mo",
    "shells": [
      2,
      8,
      18,
      13,
      1
    ],
    "electron_affinity": 72.1,
    "electronegativity": 2.16,
    "ionization_energies": [
      684.3,
      1560,
      2618,
      4480,
      5257,
      6640.8,
      12125,
      13860,
      15835,
      17980,
      20190,
      22219,
      26930,
      29196,
      52490,
      55000,
      61400,
      67700,
      74000,
      80400,
      87000,
      93400,
      98420,
      104400,
      121900,
      127700,
      133800,
      139800,
      148100,
      154500
    ]
  },
  {
    "name": "Technetium",
    "atomic_mass": 98,
    "boiling_point": 4538,
    "density": 11,
    "melting_point": 2430,
    "molar_heat": 24.27,
    "number": 43,
    "phase": "Solid",
    "symbol": "Tc",
    "shells": [
      2,
      8,
      18,
      13,
      2
    ],
    "electron_affinity": 53,
    "electronegativity": 1.9,
    "ionization_energies": [
      702,
      1470,
      2850
    ]
  },
  {
    "name": "Ruthenium",
    "atomic_mass": 101.072,
    "boiling_point": 4423,
    "density": 12.45,
    "melting_point": 2607,
    "molar_heat": 24.06,
    "number": 44,
    "phase": "Solid",
    "symbol": "Ru",
    "shells": [
      2,
      8,
      18,
      15,
      1
    ],
    "electron_affinity": 100.96,
    "electronegativity": 2.2,
    "ionization_energies": [
      710.2,
      1620,
      2747
    ]
  },
  {
    "name": "Rhodium",
    "atomic_mass": 102.905502,
    "boiling_point": 3968,
    "density": 12.41,
    "melting_point": 2237,
    "molar_heat": 24.98,
    "number": 45,
    "phase": "Solid",
    "symbol": "Rh",
    "shells": [
      2,
      8,
      18,
      16,
      1
    ],
    "electron_affinity": 110.27,
    "electronegativity": 2.28,
    "ionization_energies": [
      719.7,
      1740,
      2997
    ]
  },
  {
    "name": "Palladium",
    "atomic_mass": 106.421,
    "boiling_point": 3236,
    "density": 12.023,
    "melting_point": 1828.05,
    "molar_heat": 25.98,
    "number": 46,
    "phase": "Solid",
    "symbol": "Pd",
    "shells": [
      2,
      8,
      18,
      18
    ],
    "electron_affinity": 54.24,
    "electronegativity": 2.2,
    "ionization_energies": [
      804.4,
      1870,
      3177
    ]
  },
  {
    "name": "Silver",
    "atomic_mass": 107.86822,
    "boiling_point": 2435,
    "density": 10.49,
    "melting_point": 1234.93,
    "molar_heat": 25.35,
    "number": 47,
    "phase": "Solid",
    "symbol": "Ag",
    "shells": [
      2,
      8,
      18,
      18,
      1
    ],
    "electron_affinity": 125.862,
    "electronegativity": 1.93,
    "ionization_energies": [
      731,
      2070,
      3361
    ]
  },
  {
    "name": "Cadmium",
    "atomic_mass": 112.4144,
    "boiling_point": 1040,
    "density": 8.65,
    "melting_point": 594.22,
    "molar_heat": 26.02,
    "number": 48,
    "phase": "Solid",
    "symbol": "Cd",
    "shells": [
      2,
      8,
      18,
      18,
      2
    ],
    "electron_affinity": -68,
    "electronegativity": 1.69,
    "ionization_energies": [
      867.8,
      1631.4,
      3616
    ]
  },
  {
    "name": "Indium",
    "atomic_mass": 114.8181,
    "boiling_point": 2345,
    "density": 7.31,
    "melting_point": 429.7485,
    "molar_heat": 26.74,
    "number": 49,
    "phase": "Solid",
    "symbol": "In",
    "shells": [
      2,
      8,
      18,
      18,
      3
    ],
    "electron_affinity": 37.043,
    "electronegativity": 1.78,
    "ionization_energies": [
      558.3,
      1820.7,
      2704,
      5210
    ]
  },
  {
    "name": "Tin",
    "atomic_mass": 118.7107,
    "boiling_point": 2875,
    "density": 7.365,
    "melting_point": 505.08,
    "molar_heat": 27.112,
    "number": 50,
    "phase": "Solid",
    "symbol": "Sn",
    "shells": [
      2,
      8,
      18,
      18,
      4
    ],
    "electron_affinity": 107.2984,
    "electronegativity": 1.96,
    "ionization_energies": [
      708.6,
      1411.8,
      2943,
      3930.3,
      7456
    ]
  },
  {
    "name": "Antimony",
    "atomic_mass": 121.7601,
    "boiling_point": 1908,
    "density": 6.697,
    "melting_point": 903.78,
    "molar_heat": 25.23,
    "number": 51,
    "phase": "Solid",
    "symbol": "Sb",
    "shells": [
      2,
      8,
      18,
      18,
      5
    ],
    "electron_affinity": 101.059,
    "electronegativity": 2.05,
    "ionization_energies": [
      834,
      1594.9,
      2440,
      4260,
      5400,
      10400
    ]
  },
  {
    "name": "Tellurium",
    "atomic_mass": 127.603,
    "boiling_point": 1261,
    "density": 6.24,
    "melting_point": 722.66,
    "molar_heat": 25.73,
    "number": 52,
    "phase": "Solid",
    "symbol": "Te",
    "shells": [
      2,
      8,
      18,
      18,
      6
    ],
    "electron_affinity": 190.161,
    "electronegativity": 2.1,
    "ionization_energies": [
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      1790,
      2698,
      3610,
      5668,
      6820,
      13200
    ]
  },
  {
    "name": "Iodine",
    "atomic_mass": 126.904473,
    "boiling_point": 457.4,
    "density": 4.933,
    "melting_point": 386.85,
    "molar_heat": null,
    "number": 53,
    "phase": "Solid",
    "symbol": "I",
    "shells": [
      2,
      8,
      18,
      18,
      7
    ],
    "electron_affinity": 295.1531,
    "electronegativity": 2.66,
    "ionization_energies": [
      1008.4,
      1845.9,
      3180
    ]
  },
  {
    "name": "Xenon",
    "atomic_mass": 131.2936,
    "boiling_point": 165.051,
    "density": 5.894,
    "melting_point": 161.4,
    "molar_heat": null,
    "number": 54,
    "phase": "Gas",
    "symbol": "Xe",
    "shells": [
      2,
      8,
      18,
      18,
      8
    ],
    "electron_affinity": -77,
    "electronegativity": 2.6,
    "ionization_energies": [
      1170.4,
      2046.4,
      3099.4
    ]
  },
  {
    "name": "Cesium",
    "atomic_mass": 132.905451966,
    "boiling_point": 944,
    "density": 1.93,
    "melting_point": 301.7,
    "molar_heat": 32.21,
    "number": 55,
    "phase": "Solid",
    "symbol": "Cs",
    "shells": [
      2,
      8,
      18,
      18,
      8,
      1
    ],
    "electron_affinity": 45.505,
    "electronegativity": 0.79,
    "ionization_energies": [
      375.7,
      2234.3,
      3400
    ]
  },
  {
    "name": "Barium",
    "atomic_mass": 137.3277,
    "boiling_point": 2118,
    "density": 3.51,
    "melting_point": 1000,
    "molar_heat": 28.07,
    "number": 56,
    "phase": "Solid",
    "symbol": "Ba",
    "shells": [
      2,
      8,
      18,
      18,
      8,
      2
    ],
    "electron_affinity": 13.954,
    "electronegativity": 0.89,
    "ionization_energies": [
      502.9,
      965.2,
      3600
    ]
  },
  {
    "name": "Lanthanum",
    "atomic_mass": 138.905477,
    "boiling_point": 3737,
    "density": 6.162,
    "melting_point": 1193,
    "molar_heat": 27.11,
    "number": 57,
    "phase": "Solid",
    "symbol": "La",
    "shells": [
      2,
      8,
      18,
      18,
      9,
      2
    ],
    "electron_affinity": 53,
    "electronegativity": 1.1,
    "ionization_energies": [
      538.1,
      1067,
      1850.3,
      4819,
      5940
    ]
  },
  {
    "name": "Cerium",
    "atomic_mass": 140.1161,
    "boiling_point": 3716,
    "density": 6.77,
    "melting_point": 1068,
    "molar_heat": 26.94,
    "number": 58,
    "phase": "Solid",
    "symbol": "Ce",
    "shells": [
      2,
      8,
      18,
      19,
      9,
      2
    ],
    "electron_affinity": 55,
    "electronegativity": 1.12,
    "ionization_energies": [
      534.4,
      1050,
      1949,
      3547,
      6325,
      7490
    ]
  },
  {
    "name": "Praseodymium",
    "atomic_mass": 140.907662,
    "boiling_point": 3403,
    "density": 6.77,
    "melting_point": 1208,
    "molar_heat": 27.2,
    "number": 59,
    "phase": "Solid",
    "symbol": "Pr",
    "shells": [
      2,
      8,
      18,
      21,
      8,
      2
    ],
    "electron_affinity": 93,
    "electronegativity": 1.13,
    "ionization_energies": [
      527,
      1020,
      2086,
      3761,
      5551
    ]
  },
  {
    "name": "Neodymium",
    "atomic_mass": 144.2423,
    "boiling_point": 3347,
    "density": 7.01,
    "melting_point": 1297,
    "molar_heat": 27.45,
    "number": 60,
    "phase": "Solid",
    "symbol": "Nd",
    "shells": [
      2,
      8,
      18,
      22,
      8,
      2
    ],
    "electron_affinity": 184.87,
    "electronegativity": 1.14,
    "ionization_energies": [
      533.1,
      1040,
      2130,
      3900
    ]
  },
  {
    "name": "Promethium",
    "atomic_mass": 145,
    "boiling_point": 3273,
    "density": 7.26,
    "melting_point": 1315,
    "molar_heat": null,
    "number": 61,
    "phase": "Solid",
    "symbol": "Pm",
    "shells": [
      2,
      8,
      18,
      23,
      8,
      2
    ],
    "electron_affinity": 12.45,
    "electronegativity": 1.13,
    "ionization_energies": [
      540,
      1050,
      2150,
      3970
    ]
  },
  {
    "name": "Samarium",
    "atomic_mass": 150.362,
    "boiling_point": 2173,
    "density": 7.52,
    "melting_point": 1345,
    "molar_heat": 29.54,
    "number": 62,
    "phase": "Solid",
    "symbol": "Sm",
    "shells": [
      2,
      8,
      18,
      24,
      8,
      2
    ],
    "electron_affinity": 15.63,
    "electronegativity": 1.17,
    "ionization_energies": [
      544.5,
      1070,
      2260,
      3990
    ]
  },
  {
    "name": "Europium",
    "atomic_mass": 151.9641,
    "boiling_point": 1802,
    "density": 5.264,
    "melting_point": 1099,
    "molar_heat": 27.66,
    "number": 63,
    "phase": "Solid",
    "symbol": "Eu",
    "shells": [
      2,
      8,
      18,
      25,
      8,
      2
    ],
    "electron_affinity": 11.2,
    "electronegativity": 1.2,
    "ionization_energies": [
      547.1,
      1085,
      2404,
      4120
    ]
  },
  {
    "name": "Gadolinium",
    "atomic_mass": 157.253,
    "boiling_point": 3273,
    "density": 7.9,
    "melting_point": 1585,
    "molar_heat": 37.03,
    "number": 64,
    "phase": "Solid",
    "symbol": "Gd",
    "shells": [
      2,
      8,
      18,
      25,
      9,
      2
    ],
    "electron_affinity": 13.22,
    "electronegativity": 1.2,
    "ionization_energies": [
      593.4,
      1170,
      1990,
      4250
    ]
  },
  {
    "name": "Terbium",
    "atomic_mass": 158.925352,
    "boiling_point": 3396,
    "density": 8.23,
    "melting_point": 1629,
    "molar_heat": 28.91,
    "number": 65,
    "phase": "Solid",
    "symbol": "Tb",
    "shells": [
      2,
      8,
      18,
      27,
      8,
      2
    ],
    "electron_affinity": 112.4,
    "electronegativity": 1.1,
    "ionization_energies": [
      565.8,
      1110,
      2114,
      3839
    ]
  },
  {
    "name": "Dysprosium",
    "atomic_mass": 162.5001,
    "boiling_point": 2840,
    "density": 8.54,
    "melting_point": 1680,
    "molar_heat": 27.7,
    "number": 66,
    "phase": "Solid",
    "symbol": "Dy",
    "shells": [
      2,
      8,
      18,
      28,
      8,
      2
    ],
    "electron_affinity": 33.96,
    "electronegativity": 1.22,
    "ionization_energies": [
      573,
      1130,
      2200,
      3990
    ]
  },
  {
    "name": "Holmium",
    "atomic_mass": 164.930332,
    "boiling_point": 2873,
    "density": 8.79,
    "melting_point": 1734,
    "molar_heat": 27.15,
    "number": 67,
    "phase": "Solid",
    "symbol": "Ho",
    "shells": [
      2,
      8,
      18,
      29,
      8,
      2
    ],
    "electron_affinity": 32.61,
    "electronegativity": 1.23,
    "ionization_energies": [
      581,
      1140,
      2204,
      4100
    ]
  },
  {
    "name": "Erbium",
    "atomic_mass": 167.2593,
    "boiling_point": 3141,
    "density": 9.066,
    "melting_point": 1802,
    "molar_heat": 28.12,
    "number": 68,
    "phase": "Solid",
    "symbol": "Er",
    "shells": [
      2,
      8,
      18,
      30,
      8,
      2
    ],
    "electron_affinity": 30.1,
    "electronegativity": 1.24,
    "ionization_energies": [
      589.3,
      1150,
      2194,
      4120
    ]
  },
  {
    "name": "Thulium",
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    "boiling_point": 2223,
    "density": 9.32,
    "melting_point": 1818,
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    "phase": "Solid",
    "symbol": "Tm",
    "shells": [
      2,
      8,
      18,
      31,
      8,
      2
    ],
    "electron_affinity": 99,
    "electronegativity": 1.25,
    "ionization_energies": [
      596.7,
      1160,
      2285,
      4120
    ]
  },
  {
    "name": "Ytterbium",
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    "phase": "Solid",
    "symbol": "Yb",
    "shells": [
      2,
      8,
      18,
      32,
      8,
      2
    ],
    "electron_affinity": -1.93,
    "electronegativity": 1.1,
    "ionization_energies": [
      603.4,
      1174.8,
      2417,
      4203
    ]
  },
  {
    "name": "Lutetium",
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    "boiling_point": 3675,
    "density": 9.841,
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    "phase": "Solid",
    "symbol": "Lu",
    "shells": [
      2,
      8,
      18,
      32,
      9,
      2
    ],
    "electron_affinity": 33.4,
    "electronegativity": 1.27,
    "ionization_energies": [
      523.5,
      1340,
      2022.3,
      4370,
      6445
    ]
  },
  {
    "name": "Hafnium",
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    "boiling_point": 4876,
    "density": 13.31,
    "melting_point": 2506,
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    "number": 72,
    "phase": "Solid",
    "symbol": "Hf",
    "shells": [
      2,
      8,
      18,
      32,
      10,
      2
    ],
    "electron_affinity": 17.18,
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    "ionization_energies": [
      658.5,
      1440,
      2250,
      3216
    ]
  },
  {
    "name": "Tantalum",
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    "boiling_point": 5731,
    "density": 16.69,
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    "molar_heat": 25.36,
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    "phase": "Solid",
    "symbol": "Ta",
    "shells": [
      2,
      8,
      18,
      32,
      11,
      2
    ],
    "electron_affinity": 31,
    "electronegativity": 1.5,
    "ionization_energies": [
      761,
      1500
    ]
  },
  {
    "name": "Tungsten",
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    "melting_point": 3695,
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    "phase": "Solid",
    "symbol": "W",
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      2,
      8,
      18,
      32,
      12,
      2
    ],
    "electron_affinity": 78.76,
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    "ionization_energies": [
      770,
      1700
    ]
  },
  {
    "name": "Rhenium",
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    "boiling_point": 5869,
    "density": 21.02,
    "melting_point": 3459,
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    "phase": "Solid",
    "symbol": "Re",
    "shells": [
      2,
      8,
      18,
      32,
      13,
      2
    ],
    "electron_affinity": 5.8273,
    "electronegativity": 1.9,
    "ionization_energies": [
      760,
      1260,
      2510,
      3640
    ]
  },
  {
    "name": "Osmium",
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    "boiling_point": 5285,
    "density": 22.59,
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    "phase": "Solid",
    "symbol": "Os",
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      2,
      8,
      18,
      32,
      14,
      2
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    "electron_affinity": 103.99,
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    "ionization_energies": [
      840,
      1600
    ]
  },
  {
    "name": "Iridium",
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    "density": 22.56,
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    "phase": "Solid",
    "symbol": "Ir",
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      2,
      8,
      18,
      32,
      15,
      2
    ],
    "electron_affinity": 150.94,
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    "ionization_energies": [
      880,
      1600
    ]
  },
  {
    "name": "Platinum",
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    "density": 21.45,
    "melting_point": 2041.4,
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    "phase": "Solid",
    "symbol": "Pt",
    "shells": [
      2,
      8,
      18,
      32,
      17,
      1
    ],
    "electron_affinity": 205.041,
    "electronegativity": 2.28,
    "ionization_energies": [
      870,
      1791
    ]
  },
  {
    "name": "Gold",
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    "density": 19.3,
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    "phase": "Solid",
    "symbol": "Au",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      1
    ],
    "electron_affinity": 222.747,
    "electronegativity": 2.54,
    "ionization_energies": [
      890.1,
      1980
    ]
  },
  {
    "name": "Mercury",
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    "density": 13.534,
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    "number": 80,
    "phase": "Liquid",
    "symbol": "Hg",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      2
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    "electron_affinity": -48,
    "electronegativity": 2,
    "ionization_energies": [
      1007.1,
      1810,
      3300
    ]
  },
  {
    "name": "Thallium",
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    "density": 11.85,
    "melting_point": 577,
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    "number": 81,
    "phase": "Solid",
    "symbol": "Tl",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      3
    ],
    "electron_affinity": 36.4,
    "electronegativity": 1.62,
    "ionization_energies": [
      589.4,
      1971,
      2878
    ]
  },
  {
    "name": "Lead",
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    "boiling_point": 2022,
    "density": 11.34,
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    "phase": "Solid",
    "symbol": "Pb",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      4
    ],
    "electron_affinity": 34.4204,
    "electronegativity": 1.87,
    "ionization_energies": [
      715.6,
      1450.5,
      3081.5,
      4083,
      6640
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  },
  {
    "name": "Bismuth",
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    "boiling_point": 1837,
    "density": 9.78,
    "melting_point": 544.7,
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    "phase": "Solid",
    "symbol": "Bi",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      5
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    "electron_affinity": 90.924,
    "electronegativity": 2.02,
    "ionization_energies": [
      703,
      1610,
      2466,
      4370,
      5400,
      8520
    ]
  },
  {
    "name": "Polonium",
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    "boiling_point": 1235,
    "density": 9.196,
    "melting_point": 527,
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    "number": 84,
    "phase": "Solid",
    "symbol": "Po",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      6
    ],
    "electron_affinity": 136,
    "electronegativity": 2,
    "ionization_energies": [
      812.1
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  },
  {
    "name": "Astatine",
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    "boiling_point": 610,
    "density": 6.35,
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    "molar_heat": null,
    "number": 85,
    "phase": "Solid",
    "symbol": "At",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      7
    ],
    "electron_affinity": 233,
    "electronegativity": 2.2,
    "ionization_energies": [
      899.003
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  },
  {
    "name": "Radon",
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    "boiling_point": 211.5,
    "density": 9.73,
    "melting_point": 202,
    "molar_heat": null,
    "number": 86,
    "phase": "Gas",
    "symbol": "Rn",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      8
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    "electron_affinity": -68,
    "electronegativity": 2.2,
    "ionization_energies": [
      1037
    ]
  },
  {
    "name": "Francium",
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    "density": 1.87,
    "melting_point": 300,
    "molar_heat": null,
    "number": 87,
    "phase": "Solid",
    "symbol": "Fr",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      8,
      1
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    "electron_affinity": 46.89,
    "electronegativity": 0.79,
    "ionization_energies": [
      380
    ]
  },
  {
    "name": "Radium",
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    "density": 5.5,
    "melting_point": 1233,
    "molar_heat": null,
    "number": 88,
    "phase": "Solid",
    "symbol": "Ra",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      8,
      2
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    "electron_affinity": 9.6485,
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    "ionization_energies": [
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      979
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  },
  {
    "name": "Actinium",
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    "boiling_point": 3500,
    "density": 10,
    "melting_point": 1500,
    "molar_heat": 27.2,
    "number": 89,
    "phase": "Solid",
    "symbol": "Ac",
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      2,
      8,
      18,
      32,
      18,
      9,
      2
    ],
    "electron_affinity": 33.77,
    "electronegativity": 1.1,
    "ionization_energies": [
      499,
      1170
    ]
  },
  {
    "name": "Thorium",
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    "boiling_point": 5061,
    "density": 11.724,
    "melting_point": 2023,
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    "number": 90,
    "phase": "Solid",
    "symbol": "Th",
    "shells": [
      2,
      8,
      18,
      32,
      18,
      10,
      2
    ],
    "electron_affinity": 112.72,
    "electronegativity": 1.3,
    "ionization_energies": [
      587,
      1110,
      1930,
      2780
    ]
  },
  {
    "name": "Protactinium",
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    "boiling_point": 4300,
    "density": 15.37,
    "melting_point": 1841,
    "molar_heat": null,
    "number": 91,
    "phase": "Solid",
    "symbol": "Pa",
    "shells": [
      2,
      8,
      18,
      32,
      20,
      9,
      2
    ],
    "electron_affinity": 53.03,
    "electronegativity": 1.5,
    "ionization_energies": [
      568
    ]
  },
  {
    "name": "Uranium",
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    "density": 19.1,
    "melting_point": 1405.3,
    "molar_heat": 27.665,
    "number": 92,
    "phase": "Solid",
    "symbol": "U",
    "shells": [
      2,
      8,
      18,
      32,
      21,
      9,
      2
    ],
    "electron_affinity": 50.94,
    "electronegativity": 1.38,
    "ionization_energies": [
      597.6,
      1420
    ]
  },
  {
    "name": "Neptunium",
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    "boiling_point": 4447,
    "density": 20.45,
    "melting_point": 912,
    "molar_heat": 29.46,
    "number": 93,
    "phase": "Solid",
    "symbol": "Np",
    "shells": [
      2,
      8,
      18,
      32,
      22,
      9,
      2
    ],
    "electron_affinity": 45.85,
    "electronegativity": 1.36,
    "ionization_energies": [
      604.5
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  },
  {
    "name": "Plutonium",
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    "boiling_point": 3505,
    "density": 19.816,
    "melting_point": 912.5,
    "molar_heat": 35.5,
    "number": 94,
    "phase": "Solid",
    "symbol": "Pu",
    "shells": [
      2,
      8,
      18,
      32,
      24,
      8,
      2
    ],
    "electron_affinity": -48.33,
    "electronegativity": 1.28,
    "ionization_energies": [
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    ]
  },
  {
    "name": "Americium",
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    "boiling_point": 2880,
    "density": 12,
    "melting_point": 1449,
    "molar_heat": 62.7,
    "number": 95,
    "phase": "Solid",
    "symbol": "Am",
    "shells": [
      2,
      8,
      18,
      32,
      25,
      8,
      2
    ],
    "electron_affinity": 9.93,
    "electronegativity": 1.13,
    "ionization_energies": [
      578
    ]
  },
  {
    "name": "Curium",
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    "boiling_point": 3383,
    "density": 13.51,
    "melting_point": 1613,
    "molar_heat": null,
    "number": 96,
    "phase": "Solid",
    "symbol": "Cm",
    "shells": [
      2,
      8,
      18,
      32,
      25,
      9,
      2
    ],
    "electron_affinity": 27.17,
    "electronegativity": 1.28,
    "ionization_energies": [
      581
    ]
  },
  {
    "name": "Berkelium",
    "atomic_mass": 247,
    "boiling_point": 2900,
    "density": 14.78,
    "melting_point": 1259,
    "molar_heat": null,
    "number": 97,
    "phase": "Solid",
    "symbol": "Bk",
    "shells": [
      2,
      8,
      18,
      32,
      27,
      8,
      2
    ],
    "electron_affinity": -165.24,
    "electronegativity": 1.3,
    "ionization_energies": [
      601
    ]
  },
  {
    "name": "Californium",
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    "boiling_point": 1743,
    "density": 15.1,
    "melting_point": 1173,
    "molar_heat": null,
    "number": 98,
    "phase": "Solid",
    "symbol": "Cf",
    "shells": [
      2,
      8,
      18,
      32,
      28,
      8,
      2
    ],
    "electron_affinity": -97.31,
    "electronegativity": 1.3,
    "ionization_energies": [
      608
    ]
  },
  {
    "name": "Einsteinium",
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    "boiling_point": 1269,
    "density": 8.84,
    "melting_point": 1133,
    "molar_heat": null,
    "number": 99,
    "phase": "Solid",
    "symbol": "Es",
    "shells": [
      2,
      8,
      18,
      32,
      29,
      8,
      2
    ],
    "electron_affinity": -28.6,
    "electronegativity": 1.3,
    "ionization_energies": [
      619
    ]
  },
  {
    "name": "Fermium",
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    "boiling_point": null,
    "density": null,
    "melting_point": 1800,
    "molar_heat": null,
    "number": 100,
    "phase": "Solid",
    "symbol": "Fm",
    "shells": [
      2,
      8,
      18,
      32,
      30,
      8,
      2
    ],
    "electron_affinity": 33.96,
    "electronegativity": 1.3,
    "ionization_energies": [
      627
    ]
  },
  {
    "name": "Mendelevium",
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    "boiling_point": null,
    "density": null,
    "melting_point": 1100,
    "molar_heat": null,
    "number": 101,
    "phase": "Solid",
    "symbol": "Md",
    "shells": [
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      8,
      18,
      32,
      31,
      8,
      2
    ],
    "electron_affinity": 93.91,
    "electronegativity": 1.3,
    "ionization_energies": [
      635
    ]
  },
  {
    "name": "Nobelium",
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    "boiling_point": null,
    "density": null,
    "melting_point": 1100,
    "molar_heat": null,
    "number": 102,
    "phase": "Solid",
    "symbol": "No",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      8,
      2
    ],
    "electron_affinity": -223.22,
    "electronegativity": 1.3,
    "ionization_energies": [
      642
    ]
  },
  {
    "name": "Lawrencium",
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    "boiling_point": null,
    "density": null,
    "melting_point": 1900,
    "molar_heat": null,
    "number": 103,
    "phase": "Solid",
    "symbol": "Lr",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      8,
      3
    ],
    "electron_affinity": -30.04,
    "electronegativity": 1.3,
    "ionization_energies": [
      470
    ]
  },
  {
    "name": "Rutherfordium",
    "atomic_mass": 267,
    "boiling_point": 5800,
    "density": 23.2,
    "melting_point": 2400,
    "molar_heat": null,
    "number": 104,
    "phase": "Solid",
    "symbol": "Rf",
    "shells": [
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      8,
      18,
      32,
      32,
      10,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": [
      580
    ]
  },
  {
    "name": "Dubnium",
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    "boiling_point": null,
    "density": 29.3,
    "melting_point": null,
    "molar_heat": null,
    "number": 105,
    "phase": "Solid",
    "symbol": "Db",
    "shells": [
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      8,
      18,
      32,
      32,
      11,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Seaborgium",
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    "boiling_point": null,
    "density": 35,
    "melting_point": null,
    "molar_heat": null,
    "number": 106,
    "phase": "Solid",
    "symbol": "Sg",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      12,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Bohrium",
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    "boiling_point": null,
    "density": 37.1,
    "melting_point": null,
    "molar_heat": null,
    "number": 107,
    "phase": "Solid",
    "symbol": "Bh",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      13,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Hassium",
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    "boiling_point": null,
    "density": 40.7,
    "melting_point": 126,
    "molar_heat": null,
    "number": 108,
    "phase": "Solid",
    "symbol": "Hs",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      14,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Meitnerium",
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    "boiling_point": null,
    "density": 37.4,
    "melting_point": null,
    "molar_heat": null,
    "number": 109,
    "phase": "Solid",
    "symbol": "Mt",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      15,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Darmstadtium",
    "atomic_mass": 281,
    "boiling_point": null,
    "density": 34.8,
    "melting_point": null,
    "molar_heat": null,
    "number": 110,
    "phase": "Solid",
    "symbol": "Ds",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      16,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Roentgenium",
    "atomic_mass": 282,
    "boiling_point": null,
    "density": 28.7,
    "melting_point": null,
    "molar_heat": null,
    "number": 111,
    "phase": "Solid",
    "symbol": "Rg",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      17,
      2
    ],
    "electron_affinity": 151,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Copernicium",
    "atomic_mass": 285,
    "boiling_point": 3570,
    "density": 23.7,
    "melting_point": null,
    "molar_heat": null,
    "number": 112,
    "phase": "Gas",
    "symbol": "Cn",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      2
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Nihonium",
    "atomic_mass": 286,
    "boiling_point": 1430,
    "density": 16,
    "melting_point": 700,
    "molar_heat": null,
    "number": 113,
    "phase": "Solid",
    "symbol": "Nh",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      3
    ],
    "electron_affinity": 66.6,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Flerovium",
    "atomic_mass": 289,
    "boiling_point": 420,
    "density": 14,
    "melting_point": 340,
    "molar_heat": null,
    "number": 114,
    "phase": "Solid",
    "symbol": "Fl",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      4
    ],
    "electron_affinity": null,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Moscovium",
    "atomic_mass": 289,
    "boiling_point": 1400,
    "density": 13.5,
    "melting_point": 670,
    "molar_heat": null,
    "number": 115,
    "phase": "Solid",
    "symbol": "Mc",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      5
    ],
    "electron_affinity": 35.3,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Livermorium",
    "atomic_mass": 293,
    "boiling_point": 1085,
    "density": 12.9,
    "melting_point": 709,
    "molar_heat": null,
    "number": 116,
    "phase": "Solid",
    "symbol": "Lv",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      6
    ],
    "electron_affinity": 74.9,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Tennessine",
    "atomic_mass": 294,
    "boiling_point": 883,
    "density": 7.17,
    "melting_point": 723,
    "molar_heat": null,
    "number": 117,
    "phase": "Solid",
    "symbol": "Ts",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      7
    ],
    "electron_affinity": 165.9,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Oganesson",
    "atomic_mass": 294,
    "boiling_point": 350,
    "density": 4.95,
    "melting_point": null,
    "molar_heat": null,
    "number": 118,
    "phase": "Solid",
    "symbol": "Og",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      8
    ],
    "electron_affinity": 5.40318,
    "electronegativity": null,
    "ionization_energies": []
  },
  {
    "name": "Ununennium",
    "atomic_mass": 315,
    "boiling_point": 630,
    "density": 3,
    "melting_point": null,
    "molar_heat": null,
    "number": 119,
    "phase": "Solid",
    "symbol": "Uue",
    "shells": [
      2,
      8,
      18,
      32,
      32,
      18,
      8,
      1
    ],
    "electron_affinity": 63.87,
    "electronegativity": null,
    "ionization_energies": []
  }
]