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Fr
Francium
#87 · I-Alkali Metal
| I-Mass | 223.01973 u |
| Uxinano | 1.87 g/cm³ |
| Uthuthu | 300.0 K |
| Ukomisa | 950.0 K |
| Electronegativity | 0.7 |
| Ionization energy | 380.0 kJ/mol |
| Atomic radius: | 260.0 pm |
| I-Block | s- iblock |
| Ilizwe (RT) | I-Solid |
| Qwalasela | [Rn] 7s1 |