Sodium vs Calcium
Pick up to 3 elements and see how they stack up.
| Property | Sodium | Calcium |
|---|---|---|
| Atomic number | 11 | 20 |
| Atomic mass | 22.99 | 40.078 |
| Electronegativity | 0.93 | 1 |
| Melting point | 370.94 K (97.8 °C) | 1,115 K (841.8 °C) |
| Boiling point | 1,156.09 K (882.9 °C) | 1,757 K (1,483.8 °C) |
| Density | 0.968 g/cm³ | 1.54 g/cm³ |
| Atomic radius | 227 pm | 231 pm |
| Ionization energy | 5.139 eV | 6.113 eV |
| Discovered | 1807 | 1808 |
| Category | Alkali metal | Alkaline earth metal |
| State at room temp. | Solid | Solid |
| Block | s | s |
| Group | 1 | 2 |
| Period | 3 | 4 |
| Valence electrons | 1 | 2 |
| Common charges | +1 | +2 |
| Electron configuration | [Ne] 3s1 | [Ar] 4s2 |