Boron vs Arsenic
| Property | B Boron | As Arsenic |
|---|---|---|
| Atomic number | 5 | 33 |
| Symbol | B | As |
| Name | Boron | Arsenic |
| Category | metalloid | metalloid |
| Standard Atomic Weight | 10.8135 u | 74.921595 u |
| Period | 2 | 4 |
| Group | 13 | 15 |
| Block | p | p |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s22p1 | [Ar]4s23d104p3 |
| Oxidation states | [-5, -1, 0, 1, 2, 3] | [-3, -2, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 2.04 | 2.18 |
| Electron affinity | 0.27972 eV | 0.81 eV |
| Density | 2370 kg/m³ | 5776 kg/m³ |
| Melting point | 2074.85 °C | 816.85 °C |
| Boiling point | 3999.85 °C | 613.85 °C |
| Discovery year | 1808 | 1250 |