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| Oxygen | ||||
| Classification: Non-metal, Group: Chalcogen, Symbol: O, Crystal structure: Cubic, Electron configuration: 1s2 2s2p4 | ||||
| Property | Value in metric unit | Value in US unit | ||
| Atomic radius | 0.65 | Å | 0.65 | Å |
|---|---|---|---|---|
| Covalent radius | 0.73 | Å | 0.73 | Å |
| Ionic radius (-2) | 1.4 | Å | 1.4 | Å |
| Lattice constant | 6.83 | Å | 6.83 | Å |
| Valence electron potential | -20.6 | eV | -20.6 | eV |
| Energy of first ionization | 1314 | kJ/mol | 313.8 | kcal/mol |
| Energy of second ionization | 3388 | kJ/mol | 809.2 | kcal/mol |
| Energy of third ionization | 5300 | kJ/mol | 1266 | kcal/mol |
| Electro-chemical equivalent | 0.2984 *10-3 | kg/A*hr | 1.023 *10-2 | oz/A*hr |
| Electro-negativity (Pauling) | 3.44 | 3.44 | ||
| Atomic mass (average) | 15.9994 | 15.9994 | ||
| Atomic volume | 14.0 | cm³/mol | 0.854 | in³/mol |
| Density at 68°F (20°C), 1 atm. | 1.429 | kg/m³ | 0.0892 | lb/ft³ |
| Heat of fusion | 0.22259 | kJ/mol | 0.053165 | kcal/mol |
| Heat of vaporization | 3.4099 | kJ/mol | 0.81444 | kcal/mol |
| Specific heat capacity | 920 | J/(kg*K) | 0.220 | BTU/(lb*ºF) |
| Boiling point | -183.0 | ºC | -297.4 | ºF |
| Melting Point | -218.4 | ºC | -361.12 | ºF |
| Thermal conductivity at 68°F (20°C), 1 atm. | 0.03 | W/(m*K) | 0.21 | BTU*in/(hr*ft²*ºF) |
| Magnetic ordering | paramagnetic | |||
| Appearance | colorless, odorless, tasteless gas; light blue liquid and solid | |||
