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Rb
Rubidium
#37 · I-Alkali Metal
| I-Mass | 85.468 u |
| Uxinano | 1.532 g/cm³ |
| Uthuthu | 312.46 K |
| Ukomisa | 961.0 K |
| Electronegativity | 0.82 |
| Ionization energy | 403.0 kJ/mol |
| Atomic radius: | 248.0 pm |
| I-Block | s- iblock |
| Ilizwe (RT) | I-Solid |
| Qwalasela | [Kr] 5s1 |