Beryllium vs Strontium
| Property | Be Beryllium | Sr Strontium |
|---|---|---|
| Atomic number | 4 | 38 |
| Symbol | Be | Sr |
| Name | Beryllium | Strontium |
| Category | alkaline-earth-metal | alkaline-earth-metal |
| Standard Atomic Weight | 9.012183 u | 87.62 u |
| Period | 2 | 5 |
| Group | 2 | 2 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s2 | [Kr]5s2 |
| Oxidation states | [0, 1, 2] | [1, 2] |
| Electronegativity (Pauling) | 1.57 | 0.95 |
| Electron affinity | -0.52 eV | 0.052 eV |
| Density | 1850 kg/m³ | 2640 kg/m³ |
| Melting point | 1286.85 °C | 776.85 °C |
| Boiling point | 2470.85 °C | 1381.85 °C |
| Discovery year | 1797 | 1792 |