Boron vs Cobalt
| Property | B Boron | Co Cobalt |
|---|---|---|
| Atomic number | 5 | 27 |
| Symbol | B | Co |
| Name | Boron | Cobalt |
| Category | metalloid | transition-metal |
| Standard Atomic Weight | 10.8135 u | 58.933194 u |
| Period | 2 | 4 |
| Group | 13 | 9 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s22p1 | [Ar]4s23d7 |
| Oxidation states | [-5, -1, 0, 1, 2, 3] | [-3, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 2.04 | 1.88 |
| Electron affinity | 0.27972 eV | 0.661 eV |
| Density | 2370 kg/m³ | 8860 kg/m³ |
| Melting point | 2074.85 °C | 1494.85 °C |
| Boiling point | 3999.85 °C | 2926.85 °C |
| Discovery year | 1808 | 1735 |