| Property | Value |
|---|---|
| Atoomnummer | 76 |
| Atoomgewicht | 190.233 amu |
| Element family | Overgangsmetalen |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | 187Os: 1.6%, 188Os: 13.3%, 189Os: 16.1%, 190Os: 26.4%, 192Os: 41.0% |
| Previous element | Rhenium |
| Next element | Iridium |
| Dichtheid | 22.61 g/cm3 (STP) |
| Smelten | 3027 °C |
| Kookpunt | 5027 °C |
| Covalente straal | 1.29 Å |
| Ionstraal | 0.63 Å |
| Metalic radius | 1.35 Å |
| Eerst ionisatiepotentiaal | 8.706 eV |
| Elektronenaffiniteit | 1.078 eV |
| Electronegativity | 2.2 |
| Discovery year | 1803 |
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