| Element | Boron | Symbol | B |
| Atomic Number | 5 | Molar Mass | 10.81 gmol-1 |
| Electron Configuration | [He]2s22p1 | Normal State | solid metaloid |
| Density @STP | 2.47 g cm-3 | Melting Point | 2075oC |
| Boiling Point | 4000oC | Stable Isotopes | 10B, 11B |
| Atomic Radius | 88 pm | Ionic Radius | 12 (3+) pm |
| Electronegativity (Pauling) | 2.04 | Ionization Energy (1st) | 801 kJ mol-1 |
| Ionization Energy (2nd) | 2427 kJ mol-1 | Ionization Energy (3rd) | 3660 kJ mol-1 |
| Molar Heat Capacity | 11.1 J K-1mol-1 | Standard Molar Entropy | 5.9 J K-1mol-1 |
| Enthalpy of Fusion | 22.2 kJ mol-1 | Enthalpy of Vapourization | 538.9 kJ mol-1 |