{
    "Units": {
        "AtomicMass":         "Da",
        "MeltingPoint":       "K",
        "BoilingPoint":       "K",
        "HeatOfFusion":       "kJ * mol^{-1}",
        "HeatOfVaporization": "kJ * mol^{-1}",
        "Half-life":          "Years"
    },

    "Hydrogen": {
        "AtomicNumber": 1,

        "Isotopes": {
            "Protium": {
                "Neutrons": 0,
                "AtomicMass": 1.008,
                "Half-life": null
            },

            "Deuterium": {
                "Neutrons": 1,
                "AtomicMass": 2.014,
                "Half-life": null
            },

            "Tritium": {
                "Neutrons": 2,
                "AtomicMass": 3.016,
                "Half-life": 12.32
            }
        },

        "Allotropes": {
            "Standart": {
                "Formula": "H_{2}",
                "AtomicMass": 2.016,
                "MeltingPoint": 14,
                "BoilingPoint": 20.3,
                "HeatOfFusion": 0.117,
                "HeatOfVaporization": 0.904
            },

            "Metallic": {}
        }
    }
}