Lithium vs Beryllium
Pick up to 3 elements and see how they stack up.
| Property | Lithium | Beryllium |
|---|---|---|
| Atomic number | 3 | 4 |
| Atomic mass | 6.94 | 9.0122 |
| Electronegativity | 0.98 | 1.57 |
| Melting point | 453.65 K (180.5 °C) | 1,560 K (1,286.8 °C) |
| Boiling point | 1,603 K (1,329.8 °C) | 2,742 K (2,468.8 °C) |
| Density | 0.534 g/cm³ | 1.85 g/cm³ |
| Atomic radius | 182 pm | 153 pm |
| Ionization energy | 5.392 eV | 9.323 eV |
| Discovered | 1817 | 1798 |
| Category | Alkali metal | Alkaline earth metal |
| State at room temp. | Solid | Solid |
| Block | s | s |
| Group | 1 | 2 |
| Period | 2 | 2 |
| Valence electrons | 1 | 2 |
| Common charges | +1 | +2 |
| Electron configuration | [He] 2s1 | [He] 2s2 |