All chemical elements

Symbol

H

Atomic number

1

Chemical property

Reactive nonmetal

Origin o the name

composed of the Greek elements hydro- and -gen meaning 'water-forming'

Group

1

Period

1

Atomic weight (u)

1.008

Atomic weight uncertainty (u)

0

Density (g/cm³)

0.00009

Melting point (K)

14.01

Boiling point (K)

20.28

Heat capacity (J/(g·K))

14.304

Electro-negativity

2.2

Abundance in earth's crust (mg/kg)

1400