Atomic Number 1     Atomic Mass 1.00794     State gas

Color colorless     Electronegativity 2.2

Melting Point -259.14°C     Boiling Point -252.8°C

Natural Isotopes  H-1 99.985%   H-2 0.015%

Electron Configuration 1s¹

Discovered by Henry Cavendish in 1766.