| Property | Value |
|---|---|
| Atomic number | 5 |
| Atomic weight | 10.8117 amu |
| Element family | Semi-metals |
| Electronic configuration | 1s2 |
| Stable and very long lived isotopes | 10B: 20.0%, 11B: 80.0% |
| Previous element | Beryllium |
| Next element | Carbon |
| Density | 2.34 g/cm3 (STP) |
| Melting | 2300 °C |
| Boiling | 2550 °C |
| Covalent radius | 0.85 Å |
| Van der Waals radius | 1.92 Å |
| Ionic radius | 0.23 Å |
| First ionization potential | 8.297 eV |
| Electron affinity | 0.280 eV |
| Electronegativity | 2.04 |
| Discovery year | 1808 |
Boron is an element number 5 from semi-metals family. Its symbol is B. Boron atomic weight is 10.8117 amu. B stable and long lived isotopes are 10B: 20.0%, 11B: 80.0%. Boron electronic configuration is 1s22s22p1. Sample compounds that contain Boron are BF3, H3BO3, B2H6, NaBH4, BCl3, Na2B4O7.
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