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Rb
Rubidium
#37 · Alkaline Metal
| Mafuta | 85.468 u |
| Kuomarara | 1.532 g/cm³ |
| Kutonhora | 312.46 K |
| Kutonhora | 961.0 K |
| Electronegativity | 0.82 |
| Kutonhora | 403.0 kJ/mol |
| Atomic radius: | 248.0 pm |
| Block | s- block |
| State (RT) | _Kukanganisa: |
| Kugadzirisa | [Kr] 5s1 |