Os
Osmium
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Os |
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Osmium |
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| Atomic number | 76 |
| Atomic weight | 190.2 |
| Orbital electronic configuration | (Xe)4f145d66s2 |
| First ionization energy (eV) | 8.7 |
| Second ionization energy (eV) | 17 |
| Electronegativity (Pauling) | 2.2 |
| Atomic radius (Å) | 1.92 |
| Bonding radius (Å) | 1.26 |
| Oxidation states | 2, 3, 4, 6, 8 |
Properties |
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| Density at 300K (g/ml) | 22.4 |
| Melting point (K) | 3300 |
| Boiling point (K) | 5285 |
| Heat of vaporization (kJ/mol) | 746.0 |
| Heat of fusion (kJ/mol) | 31.80 |
| Specific heat capacity (Jg-1K-1) | 0.13 |
| Crystal structure | hexagonal |