Hf
Hafnium
Element 72 · Transition metal · Period 6, Group 4
Solid · Discovered 1923
Atomic Properties
| Atomic Number | 72 |
| Atomic Mass | 178.49u |
| Electron Configuration | [Xe]6s2 4f14 5d2 |
| Electronegativity | 1.3Pauling |
| Atomic Radius | 212pm |
| Ionization Energy | 6.825eV |
| Oxidation States | +4 |
Physical Properties
| Standard State | Solid |
| Melting Point | 2506K |
| Boiling Point | 4876K |
| Density | 13.3g/cm³ |
| Group Block | Transition metal |
| Year Discovered | 1923 |