| Element | Calcium | Symbol | Ca |
| Atomic Number | 20 | Molar Mass | 40.08 gmol-1 |
| Electron Configuration | [Ar]4s2 | Normal State | solid metal |
| Density @STP | 1.55 g cm-3 | Melting Point | 842oC |
| Boiling Point | 1484oC | Stable Isotopes | 40Ca, 42Ca, 43Ca, 44Ca, 46Ca, 48Ca |
| Atomic Radius | 197 pm | Ionic Radius | 100 (2+) pm |
| Electronegativity (Pauling) | 1 | Ionization Energy (1st) | 590 kJ mol-1 |
| Ionization Energy (2nd) | 1145 kJ mol-1 | Ionization Energy (3rd) | 4910 kJ mol-1 |
| Molar Heat Capacity | 25.9J K-1mol-1 | Standard Molar Entropy | 41.6 J K-1mol-1 |
| Enthalpy of Fusion | 9.33 kJ mol-1 | Enthalpy of Vapourization | 149.95 kJ mol-1 |