| Property | Value |
|---|---|
| Atoomnummer | 57 |
| Atoomgewicht | 138.905477 amu |
| Element family | Overgangsmetalen |
| Elektronische configuratie | 1s2 |
| Stable and very long lived isotopes | 139La: 99.91% |
| Previous element | Barium |
| Next element | Cerium |
| Dichtheid | 6.145 g/cm3 (STP) |
| Smelten | 920 °C |
| Kookpunt | 3454 °C |
| Covalente straal | 1.8 Å |
| Ionstraal | 1.061 Å |
| Metalic radius | 1.87 Å |
| Eerst ionisatiepotentiaal | 5.577 eV |
| Elektronenaffiniteit | 0.558 eV |
| Electronegativity | 1.1 |
| Discovery year | 1838 |
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