Beryllium vs Samarium
| Property | Be Beryllium | Sm Samarium |
|---|---|---|
| Atomic number | 4 | 62 |
| Symbol | Be | Sm |
| Name | Beryllium | Samarium |
| Category | alkaline-earth-metal | lanthanide |
| Standard Atomic Weight | 9.012183 u | 150.36 u |
| Period | 2 | 6 |
| Group | 2 | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s2 | [Xe]6s24f6 |
| Oxidation states | [0, 1, 2] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.57 | 1.17 |
| Electron affinity | -0.52 eV | 0.156 eV |
| Density | 1850 kg/m³ | 7520 kg/m³ |
| Melting point | 1286.85 °C | 1073.85 °C |
| Boiling point | 2470.85 °C | 1793.85 °C |
| Discovery year | 1797 | 1878 |