| Content-Type | image/png |
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| Content-Length | 2.15 kB |
| Size | 512x512 |
#72 Hafnium - rarity ZERO-KELVIN
| 1st ionization energy | 6.825 eV | 0.85% |
|---|---|---|
| appearance | Metallic gray | 0.85% |
| atomic mass | 178.49 u | 0.85% |
| atomic number | 72 | 0.85% |
| atomic radius | 212 picometers (van der Waals radius) | 0.85% |
| boiling point | 4876 K or 4603 °C or 8317 °F | 0.85% |
| cas number | 7440-58-6 | 0.85% |
| category | Transition metals | 25.42% |
| crystal structure | HCP (Hexagonal close packed) | 5.93% |
| density | 13.31 g/cm3 | 0.85% |
| electronegativity | 1.3 (Pauling scale) | 9.32% |
| electronic configuration | [Xe] 4f14 5d2 6s2 | 0.85% |
| electrons | 72 | 0.85% |
| electrons arrangement | 2, 8, 18, 32, 10, 2 | 0.85% |
| main isotopes | 180Hf | 0.85% |
| melting point | 2506 K or 2233 °C or 4051 °F | 0.85% |
| neutrons | 106 | 0.85% |
| position | Group: 4, Period: 6, Block: d | 0.85% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 72.88% |
| symbol | Hf | 0.85% |
| who discovered | George de Hevesy and Dirk Coster (in 1922) | 0.85% |
Total Rarity Score: 2041.89
Rarity: #33/354