var elements = {
    hydrogen: {"m_point": "14.01", "b_point": "20.28"},
    helium: {"m_point": "0", "b_point": "4.22"},
    //----------so on----------------------------
};

<div id="hydrogen"><em>1</em>H<p>Hydrogen</p></div>
<div id="helium"><em>2</em>He<p>Helium</p></div>
<!---------so on----------------------------------->