Calcium vs Strontium
Pick up to 3 elements and see how they stack up.
| Property | Calcium | Strontium |
|---|---|---|
| Atomic number | 20 | 38 |
| Atomic mass | 40.078 | 87.62 |
| Electronegativity | 1 | 0.95 |
| Melting point | 1,115 K (841.8 °C) | 1,050 K (776.8 °C) |
| Boiling point | 1,757 K (1,483.8 °C) | 1,650 K (1,376.8 °C) |
| Density | 1.54 g/cm³ | 2.64 g/cm³ |
| Atomic radius | 231 pm | 249 pm |
| Ionization energy | 6.113 eV | 5.695 eV |
| Discovered | 1808 | 1790 |
| Category | Alkaline earth metal | Alkaline earth metal |
| State at room temp. | Solid | Solid |
| Block | s | s |
| Group | 2 | 2 |
| Period | 4 | 5 |
| Valence electrons | 2 | 2 |
| Common charges | +2 | +2 |
| Electron configuration | [Ar] 4s2 | [Kr] 5s2 |