| Calcium | |
| Elemental State | Ca |
| Electron Configuration | 1s22s22p63s23p64s2 |
| First Ionization Potential | 6.113 eV |
| Electron Affinity | 0.0246 eV |
| Z* | 4.398 (Clementi-Raimondi) |
| Pauling Electronegativity | 1.00 |
| Covalent Radius | 1.74 Å |
| Metallic Radius | 1.97 Å |
| Ionic Radius | 1.14 Å Ca2+ coordination number
= 6
1.26 Å Ca2+ coordination number = 8 |
| van der Waal's Radius | |
| Melting Point | 842 oC |
| Boiling Point | 1484 oC |
| Density | 1.55 g/cm3 |
| Other Properties | |