< Back
|
| Atomic Number | 5 |
|
| Atomic Symbol | B |
|
| Atomic Weight | 10.811 amu |
|
| Group | Metalloid, 13 |
|
| Form | Solid |
|
| Density @ STP | 2.34 g/cm3 |
|
| Melting Point | 2075 °C (3767 °F, 2348.2 °K) |
|
| Boiling Point | 4000 °C (7230 °F, 4273 °K) |
|
| Heat of Fusion | 50.2 kJ/mol |
|
| Heat of Vaporization | 480 kJ/mol |
|
| First Ionization Potential | 8.29803 eV |
|
| Electronegativity (on Pauling scale) | 2.04 |
|
| Specific Heat Capacity | 1.026 J/g K |
|
| Ground State Electron Configuration | 2p1 |
|
| Oxidation States | +3 |
|
| Stable Isotopes and Natural Abundance on Earth | 10B, 19.9%; 11B, 80.1% |
|
| Atomic Radius | 87 pm |
|
| Crystal Structure | Rhombohedral |
|
| Discovered by | Davy; Gay-Lussac and Thenaerd; 1808 ; |
|
|
|
