Beryllium vs Yttrium
| Property | Be Beryllium | Y Yttrium |
|---|---|---|
| Atomic number | 4 | 39 |
| Symbol | Be | Y |
| Name | Beryllium | Yttrium |
| Category | alkaline-earth-metal | transition-metal |
| Standard Atomic Weight | 9.012183 u | 88.90584 u |
| Period | 2 | 5 |
| Group | 2 | 3 |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s2 | [Kr]5s24d1 |
| Oxidation states | [0, 1, 2] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 1.57 | 1.22 |
| Electron affinity | -0.52 eV | 0.307 eV |
| Density | 1850 kg/m³ | 4470 kg/m³ |
| Melting point | 1286.85 °C | 1521.85 °C |
| Boiling point | 2470.85 °C | 3344.85 °C |
| Discovery year | 1797 | 1794 |