Silicon vs Hafnium
| Property | Si Silicon | Hf Hafnium |
|---|---|---|
| Atomic number | 14 | 72 |
| Symbol | Si | Hf |
| Name | Silicon | Hafnium |
| Category | metalloid | transition-metal |
| Standard Atomic Weight | 28.085 u | 178.49 u |
| Period | 3 | 6 |
| Group | 14 | 4 |
| Block | p | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ne]3s23p2 | [Xe]6s24f145d2 |
| Oxidation states | [-4, -3, -2, -1, 0, 1, 2, 3, 4] | [-2, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 1.9 | 1.3 |
| Electron affinity | 1.385 eV | 0.178 eV |
| Density | 2329.6 kg/m³ | 1.330000e+4 kg/m³ |
| Melting point | 1413.85 °C | 2232.85 °C |
| Boiling point | 3264.85 °C | 4602.85 °C |
| Discovery year | 1824 | 1911 |