Hafnium vs Tantalum
Pick up to 3 elements and see how they stack up.
| Property | Hafnium | Tantalum |
|---|---|---|
| Atomic number | 72 | 73 |
| Atomic mass | 178.49 | 180.95 |
| Electronegativity | 1.3 | 1.5 |
| Melting point | 2,506 K (2,232.8 °C) | 3,290 K (3,016.8 °C) |
| Boiling point | 4,876 K (4,602.8 °C) | 5,731 K (5,457.8 °C) |
| Density | 13.31 g/cm³ | 16.69 g/cm³ |
| Atomic radius | 212 pm | 217 pm |
| Ionization energy | 6.825 eV | 7.89 eV |
| Discovered | 1923 | 1802 |
| Category | Transition metal | Transition metal |
| State at room temp. | Solid | Solid |
| Block | d | d |
| Group | 4 | 5 |
| Period | 6 | 6 |
| Valence electrons | 2 | 2 |
| Common charges | +4 | +5 |
| Electron configuration | [Xe] 4f14 5d2 6s2 | [Xe] 4f14 5d3 6s2 |