Beryllium vs Calcium
| Property | Be Beryllium | Ca Calcium |
|---|---|---|
| Atomic number | 4 | 20 |
| Symbol | Be | Ca |
| Name | Beryllium | Calcium |
| Category | alkaline-earth-metal | alkaline-earth-metal |
| Standard Atomic Weight | 9.012183 u | 40.078 u |
| Period | 2 | 4 |
| Group | 2 | 2 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s2 | [Ar]4s2 |
| Oxidation states | [0, 1, 2] | [1, 2] |
| Electronegativity (Pauling) | 1.57 | 1 |
| Electron affinity | -0.52 eV | 0.0245 eV |
| Density | 1850 kg/m³ | 1540 kg/m³ |
| Melting point | 1286.85 °C | 841.85 °C |
| Boiling point | 2470.85 °C | 1483.85 °C |
| Discovery year | 1797 | 1808 |