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Ca
Calcium
#20 · Alkaline Earth Metal
| I-Mass | 40.078 u |
| Uxinano | 1.55 g/cm³ |
| Uthuthu | 1115.0 K |
| Ukomisa | 1757.0 K |
| Electronegativity | 1.0 |
| Ionization energy | 589.8 kJ/mol |
| Atomic radius: | 197.0 pm |
| I-Block | s- iblock |
| Ilizwe (RT) | I-Solid |
| Qwalasela | [Ar] 4s2 |