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#77 Iridium - rarity BROWNIAN-MANIACS
| 1st ionization energy | 9.1 eV | 0.85% |
|---|---|---|
| appearance | Silvery white metallic appearance | 1.69% |
| atomic mass | 192.22 u | 0.85% |
| atomic number | 77 | 0.85% |
| atomic radius | 202 picometers (van der Waals radius) | 4.24% |
| boiling point | 4403 K or 4130 °C or 7466 °F | 0.85% |
| cas number | 7439-88-5 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Transition metals | 25.42% |
| crystal structure | FCC (Face centered cubic) | 11.02% |
| density | 22.56 g/cm3 | 0.85% |
| electronegativity | 2.2 (Pauling scale) | 5.08% |
| electronic configuration | [Xe] 4f14 5d7 6s2 | 0.85% |
| electrons | 77 | 0.85% |
| electrons arrangement | 2, 8, 18, 32, 15, 2 | 0.85% |
| main isotopes | 193Ir | 0.85% |
| melting point | 2719 K or 2446 °C or 4435 °F | 0.85% |
| neutrons | 115 | 1.69% |
| position | Group: 9, Period: 6, Block: d | 0.85% |
| rarity | BROWNIAN-MANIACS | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Ir | 0.85% |
| valence electrons | - | 61.02% |
| who discovered | Smithson Tennant in 1803 | 0.85% |
Total Rarity Score: 1834.3
Rarity: #78/354