B
Boron
Element 5 · Metalloid · Period 2, Group 13
Solid · Discovered 1808
Atomic Properties
| Atomic Number | 5 |
| Atomic Mass | 10.81u |
| Electron Configuration | [He]2s2 2p1 |
| Electronegativity | 2.04Pauling |
| Atomic Radius | 192pm |
| Ionization Energy | 8.298eV |
| Electron Affinity | 0.277eV |
| Oxidation States | +3 |
Physical Properties
| Standard State | Solid |
| Melting Point | 2348K |
| Boiling Point | 4273K |
| Density | 2.37g/cm³ |
| Group Block | Metalloid |
| Year Discovered | 1808 |