All chemical elements

Symbol

O

Atomic number

8

Chemical property

Reactive nonmetal

Origin o the name

from the Greek oxy-, both 'sharp' and 'acid', and -gen, meaning 'acid-forming'

Group

16

Period

2

Atomic weight (u)

15.999

Atomic weight uncertainty (u)

0

Density (g/cm³)

0.001429

Melting point (K)

54.36

Boiling point (K)

90.2

Heat capacity (J/(g·K))

0.918

Electro-negativity

3.44

Abundance in earth's crust (mg/kg)

461000