| Property | Value |
|---|---|
| Atoomnummer | 61 |
| Atoomgewicht | 146.9151 amu |
| Element family | N/A |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | Geen |
| Previous element | Neodymium |
| Next element | Samarium |
| Dichtheid | 7.26 g/cm3 (STP) |
| Smelten | 931 °C |
| Kookpunt | 2730 °C |
| Covalente straal | 1.73 Å |
| Ionstraal | 0.979 Å |
| Metalic radius | 1.834 Å |
| Eerst ionisatiepotentiaal | 5.597 eV |
| Elektronenaffiniteit | 0.129 eV |
| Electronegativity | 1.13 |
| Discovery year | 1945 |
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