| name | Calcium |
| latin | Calcium |
| french | Calcium |
| german | Calcium |
| symbol | Ca |
| proton number | 20 |
| atomic weight | 40.078 |
| Pauling electronegativity | 1 |
| electronic configuration | [Ar] 4s2 1s22s22p63s23p64s2 |
| melting point | 1115 K, 842°C, 1547°F |
| boiling point | 1757 K, 1484°C, 2703°F |
| group | 2 |
| period | 4 |
| state (by 20°C) | solid |
| oxidation states | +2 |
| Year of discovery | Discoverer |
| 1808 | Sir Humphry Davy (1778-1829) |