O
Oxygen
Z 8 15.999 g/molOther Nonmetal
Nucleus
8 Protons
8 Neutrons
8 Electrons (6 Valence)
Shell distribution: K2 • L6 • M0 • N0 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[He]2s22p4
Oxidation States
CommonRare
0
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Radii
Empirical
60 pm0.6 Å
Calculated
48 pm0.48 Å
Covalent
66±2 pm0.66±0.02 Å
Van der Waals
152 pm1.52 Å
IonicO2-
140 pm1.4 Å
Crystal Structure
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MonoclinicStandard state
Pearson symbol
mS4
Space group
C2/m No. 12
Density
0.001429 g/cm³