HZ =  1

From the Greek "hydro, - genes", meaning "water + begetter"
(AM) Atomic Mass 1.00794  amu    Oxidation States +1, -1
   (BP) Boiling Point -252.8  °C    (MP) Melting Point -259.1  °C
   (ρ) Density 0.000089  g/cm3    Crystal Structure Hexagonal
   ( χ ) Electronegativity 2.1    (AR) Atomic Radius 0.38  Å
   Physical State Gas (C) Heat Capacity 14.3  J/g °C
Electronic-Config 1s1     (I1) First Ionization E 1312  kJ/mol
   (ΔHvap) Heat of Vaporization 0.904  kJ/mol     (ΔHfus) Heat of Fusion 0.117  kJ/mol
   Year of Discovery 1776    Location of Discovery London
(E°) Standard Potential 2 H+⇔ H2 (0.000 V),   H2⇔ 2 H- (-2.230 V)
Stable isotopes  1H,  2H
Discovered/Synthesized by Henry Cavendish
Natural Source Isolated from the liquifaction of air
Common Uses Production of Ammonia, Hydrogenation of organic compounds, liquid Hydrogen fuel
Other Info Most abundant element in the Universe
Exists in nature as the diatomic molecule H2
Previous Element
Next Element
Back to Table
Common Properties
Home Page