Hydrogen vs Hafnium
| Property | H Hydrogen | Hf Hafnium |
|---|---|---|
| Atomic number | 1 | 72 |
| Symbol | H | Hf |
| Name | Hydrogen | Hafnium |
| Category | nonmetal | transition-metal |
| Standard Atomic Weight | 1.007975 u | 178.49 u |
| Period | 1 | 6 |
| Group | 1 | 4 |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Xe]6s24f145d2 |
| Oxidation states | [-1, 1] | [-2, 0, 1, 2, 3, 4] |
| Electronegativity (Pauling) | 2.2 | 1.3 |
| Electron affinity | 0.75419 eV | 0.178 eV |
| Density | 0.08988 kg/m³ | 1.330000e+4 kg/m³ |
| Melting point | -259.34 °C | 2232.85 °C |
| Boiling point | -252.87 °C | 4602.85 °C |
| Discovery year | 1766 | 1911 |