Periodic table of the elements
NitrogenOxygenFluorine
8
O
Oxygen
15.9994
2
6
8
O
Oxygen
15.9994
2
6
General
NameOxygen
SymbolO
Number8
Chemical seriesOther nonmetals
Group / Period16 / 2
Blockp-block
CAS registry number7782-44-7

Physical properties
Stategas
Density1.429 g/L
Melting point54.36 K (-218.79 °C, -361.82 °F)
Boiling point90.20 K (-182.95 °C, -297.31 °F)
Critical point154.59 K, 5.043 MPa

Atomic properties
Atomic Weight15.9994 g/mol
Crystal structurecubic
Electronegativity3.44
Atomic radius60 pm
Atomic radius (calculated)48 pm
Electron configuration[He] 2s2 2p4
Electrons per shell2, 6
Number of protons8
Number of neutrons8

Other languages
SpanishOxígeno
PortugueseOxigénio
FrenchOxygène
GermanSauerstoff
ItalianOssigeno
RussianКислород
PolishTlen
Chinese
Arabicأكسجين
TurkishOksijen
DutchZuurstof


Periodic table of the elements
NitrogenOxygenFluorine