Hydrogen

Properties

Atomic Number

1

Atomic Symbol

H

Atomic Mass

1.00784u

CAS No.

1333-74-0

Density

0.08988 g/L

Series

other nonmetal

Melting Point

-259.2°C

Boiling Point

-252.9°C

Thermal Conductivity

0.001805 W/cm ºC

Heat of Fusion

0.117 Kj/mol

Heat of Vaporization

0.904 Kj/mol

Electronegativity

2.20 pauling

Crystal Structure

Hexagonal