| Osmium | |
| Elemental State | Os |
| Electron Configuration | 1s22s22p63s23p63d104s24p64d104f145s25p66s25d6 |
| First Ionization Potential | 8.438 eV |
| Electron Affinity | 1.1 eV (calculated) |
| Z* | |
| Pauling Electronegativity | 2.2 |
| Covalent Radius | 1.28 Å |
| Metallic Radius | 1.35 Å |
| Ionic Radius | 0.770 Å Os4+ coordination number = 6 |
| van der Waal's Radius | |
| Melting Point | 3033 oC |
| Boiling Point | 5012 oC |
| Density | 22.57 g/cm3 |
| Other Properties | |