| General |
|---|
| Name | Calcium | | Symbol | Ca | | Number | 20 | | Chemical series | Alkaline earth metals | | Group / Period | 2 / 4 | | Block | s-block | | CAS registry number | 7440-70-2 |
| Physical properties |
|---|
| State | solid | | Density | 1.55 g/cm3 | | Melting point | 1115 K (842°C, 1548°F) | | Boiling point | 1757 K (1484°C, 2703°F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 40.078 g/mol | | Crystal structure | cubic face centered | | Electronegativity | 1.00 | | Atomic radius | 180 pm | | Atomic radius (calculated) | 194 pm | | Electron configuration | [Ar] 4s2 | | Electrons per shell | 2, 8, 8, 2 | | Number of protons | 20 | | Number of neutrons | 20 |
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Scandium