| Property | Value |
|---|---|
| Atoomnummer | 67 |
| Atoomgewicht | 164.930322 amu |
| Element family | N/A |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | 165Ho: 100% |
| Previous element | Dysprosium |
| Next element | Erbium |
| Dichtheid | 8.795 g/cm3 (STP) |
| Smelten | 1470 °C |
| Kookpunt | 2720 °C |
| Covalente straal | 1.66 Å |
| Ionstraal | 0.901 Å |
| Metalic radius | 1.762 Å |
| Eerst ionisatiepotentiaal | 6.021 eV |
| Elektronenaffiniteit | 0.338 eV |
| Electronegativity | 1.23 |
| Discovery year | 1878 |
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