Aluminum vs Hafnium
| Property | Al Aluminum | Hf Hafnium |
|---|---|---|
| Atomic number | 13 | 72 |
| Symbol | Al | Hf |
| Name | Aluminum | Hafnium |
| Category | post-transition-metal | transition-metal |
| Standard Atomic Weight | 26.981538 u | 178.49 u |
| Period | 3 | 6 |
| Group | 13 | 4 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s23p1 | [Xe]6s24f145d2 |
| Oxidation states | [-2, -1, 0, 1, 2, 3] | [-2, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 1.61 | 1.3 |
| Electron affinity | 0.4328 eV | 0.178 eV |
| Density | 2700 kg/m³ | 1.330000e+4 kg/m³ |
| Melting point | 660.287 °C | 2232.85 °C |
| Boiling point | 2518.85 °C | 4602.85 °C |
| Discovery year | 1825 | 1911 |