Hydrogen vs Beryllium
| Property | H Hydrogen | Be Beryllium |
|---|---|---|
| Atomic number | 1 | 4 |
| Symbol | H | Be |
| Name | Hydrogen | Beryllium |
| Category | nonmetal | alkaline-earth-metal |
| Standard Atomic Weight | 1.007975 u | 9.012183 u |
| Period | 1 | 2 |
| Group | 1 | 2 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [He]2s2 |
| Oxidation states | [-1, 1] | [0, 1, 2] |
| Electronegativity (Pauling) | 2.2 | 1.57 |
| Electron affinity | 0.75419 eV | -0.52 eV |
| Density | 0.08988 kg/m³ | 1850 kg/m³ |
| Melting point | -259.34 °C | 1286.85 °C |
| Boiling point | -252.87 °C | 2470.85 °C |
| Discovery year | 1766 | 1797 |