Boron vs Aluminum
Pick up to 3 elements and see how they stack up.
| Property | Boron | Aluminum |
|---|---|---|
| Atomic number | 5 | 13 |
| Atomic mass | 10.81 | 26.982 |
| Electronegativity | 2.04 | 1.61 |
| Melting point | 2,349 K (2,075.8 °C) | 933.47 K (660.3 °C) |
| Boiling point | 4,200 K (3,926.8 °C) | 2,743 K (2,469.8 °C) |
| Density | 2.34 g/cm³ | 2.7 g/cm³ |
| Atomic radius | 192 pm | 184 pm |
| Ionization energy | 8.298 eV | 5.986 eV |
| Discovered | 1808 | 1825 |
| Category | Metalloid | Post-transition metal |
| State at room temp. | Solid | Solid |
| Block | p | p |
| Group | 13 | 13 |
| Period | 2 | 3 |
| Valence electrons | 3 | 3 |
| Common charges | +3 | +3 |
| Electron configuration | [He] 2s2 2p1 | [Ne] 3s2 3p1 |