| Property | Value |
|---|---|
| Atoomnummer | 99 |
| Atoomgewicht | 252.0829 amu |
| Element family | Actinoids |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | Geen |
| Previous element | Californium |
| Next element | Fermium |
| Dichtheid | 13.5 g/cm3 (STP) |
| Smelten | 860 °C |
| Kookpunt | 996 °C |
| Ionstraal | 0.925 Å |
| Metalic radius | 1.86 Å |
| Eerst ionisatiepotentiaal | 6.415 eV |
| Elektronenaffiniteit | -0.300 eV |
| Electronegativity | 1.3 |
| Discovery year | 1952 |
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