| Oxygen | |
| Electrons per shell | 2,6 |
| Electron Configuration | 1s2 2s2 2p4 ![]() |
| Ground state | 3P2 |
| Atomic Volume | 14 cm3 mol-1 |
| Electronegativity | 3.44 |
| Magnetic ordering | Paramagnetic |
| Mass magnetic susceptibility | 1.335 x 10-6 |
| Molar magnetic susceptibility | 2.13592 x 10-8 |
| Speed of sound | 330 m s-1 |
Thermal Properties |
|
| Enthalpy of Atomization | 249.4 kJ mol-1 @25°C |
| Enthalpy of Fusion | 0.444 kJ mol-1 |
| Enthalpy of Vaporisation | 6.82 kJ mol-1 |
| Heat Capacity | (O2) 29.378 J mol-1 K-1 |
| Thermal Conductivity | 26.58 W m-1 K-1 |
| Thermal Expansion | No data. |
| Critcal Temperature | 154.6 K (-118.5°C) |
| Critcal Pressure | No data. |
| Adiabatic index | No data. |
Electrical Properties |
|
| Electrical resistivity | No data. |
| Electrical conductivity | ? 106/cm Ω |
Chemical Properties |
|
| Electrochemical Equivalent | 0.29847 g Ah-1 |
| Valence Electron Potential (-eV) | -20.6 |
| Ionization Potential | |
| 13.618 | |
| 35.117 | |
| 54.934 | |
| Incompatibilities | Oxidizable materials. |
Flammability |
|
Optical Properties |
|
| Refractive Index (gas) | 1.000271 |
Energy Levels |
|
| 0.5249 KeV | |
Atomic Radii |
|
| 60 pm | |
| 48 pm | |
| 73 pm | |
| 152 pm | |
| 53 pm | |
| No data. | |
Ionic Radii (Å) |
||||
| Charge | Coordination | Crystal | Ionic | Key |
| -2 | II | 1.21 | 1.35 | |
| III | 1.22 | 1.36 | ||
| IV | 1.24 | 1.38 | ||
| VI | 1.26 | 1.4 | ||
| VIII | 1.28 | 1.42 | ||
| -1 (OH) | II | 1.18 | 1.32 | |
| III | 1.2 | 1.34 | ||
| IV | 1.21 | 1.35 | E | |
| VI | 1.23 | 1.37 | E | |
| R, From r3 vs V plots. |
| C, Calculated from bond length - bond strength equations. |
| E, Estimated. |
| *, Most Reliable. |
| M, From Metallic Oxides. |
| A, Ahrens (1952) Ionic radius. |
| P, Pauling's (1960) Crystal Radius. |
Oxidation States |
|
| O-2 | |
| O-1, O0, O+1, O+2 | |
Ionisation Energies (kJ mol-1) ![]() |
|
| 1313.9 | |
| 3388.2 | |
| 5300.3 | |
| 7469.1 | |
| 10989.3 | |
| 13326.2 | |
| 71333.3 | |
| 84076.3 | |
Covalent Bonds (kJ mol-1) |
|
| O-O | |
| O=O | |
| O-N | |
| O-C | |
| O=C | |
Vapour Pressure |
||||||
| P (Pa) | 1 | 10 | 100 | 1K | 10K | 100K |
| T (K) | 61 | 73 | 90 | |||
Crystal Structure |
|
| Monoclinic | |
![]() |
a = 540.3 pm |
| b = 342.9 pm | |
| c = 508.6 pm | |
| α = 90° | |
| β = 132.530° | |
| γ = 90° | |