Boron vs Tantalum
| Property | B Boron | Ta Tantalum |
|---|---|---|
| Atomic number | 5 | 73 |
| Symbol | B | Ta |
| Name | Boron | Tantalum |
| Category | metalloid | transition-metal |
| Standard Atomic Weight | 10.8135 u | 180.94788 u |
| Period | 2 | 6 |
| Group | 13 | 5 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [He]2s22p1 | [Xe]6s24f145d3 |
| Oxidation states | [-5, -1, 0, 1, 2, 3] | [-3, -1, 0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 2.04 | 1.5 |
| Electron affinity | 0.27972 eV | 0.322 eV |
| Density | 2370 kg/m³ | 1.640000e+4 kg/m³ |
| Melting point | 2074.85 °C | 3016.85 °C |
| Boiling point | 3999.85 °C | 5457.85 °C |
| Discovery year | 1808 | 1802 |