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#63 · Lanthanide
| I-Mass | 151.96 u |
| Uxinano | 5.243 g/cm³ |
| Uthuthu | 1099.0 K |
| Ukomisa | 1802.0 K |
| Electronegativity | 1.2 |
| Ionization energy | 547.1 kJ/mol |
| Atomic radius: | 180.0 pm |
| I-Block | f- iblock |
| Ilizwe (RT) | I-Solid |
| Qwalasela | [Xe] 4f7 6s2 |