O
Oxygen
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O |
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Oxygen |
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| Atomic number | 8 |
| Atomic weight | 15.994 |
| Orbital electronic configuration | (He)2s22p4 |
| First ionization energy (eV) | 13.618 |
| Second ionization energy (eV) | 35.108 |
| Third ionization energy (eV) | 54.886 |
| Electronegativity (Pauling) | 3.44 |
| Atomic radius (Å) | 0.65 |
| Bonding radius (Å) | 0.73 |
| Oxidation states | -2 |
Properties |
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| Density (g/liter @ 0oC and 1 atm.) (gas) | 1.429 |
| Melting point (K) | 50.35 |
| Boiling point (K) | 90.18 |
| Heat of vaporization (kJ/mol) | 3.4099 |
| Heat of fusion (kJ/mol) | 0.22259 |
| Specific heat capacity (Jg-1K-1) | 0.92 |
| Crystal structure | cubic |