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| Content-Length | 724.32 kB |
| Size | 512x512 |
#89 Actinium - rarity BROWNIAN-MANIACS
| 1st ionization energy | 5.17 eV | 0.85% |
|---|---|---|
| appearance | Silvery white appearance | 0.85% |
| atomic mass | 227 u | 0.85% |
| atomic number | 89 | 0.85% |
| atomic radius | 260 picometers (van der Waals radius) | 0.85% |
| boiling point | - | 18.64% |
| cas number | 7440-34-8 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Actinides | 0.85% |
| crystal structure | FCC (face centered cubic) | 11.02% |
| density | 10.07 g/cm3 | 0.85% |
| electronegativity | 1.1 (Pauling scale) | 1.69% |
| electronic configuration | [Rn] 6d1 7s2 | 0.85% |
| electrons | 89 | 0.85% |
| electrons arrangement | 2, 8, 18, 32, 18, 9, 2 | 0.85% |
| main isotopes | 227Ac | 0.85% |
| melting point | - | 13.56% |
| neutrons | 138 | 1.69% |
| position | Group: actinides, Period: 7, Block: d | 0.85% |
| rarity | BROWNIAN-MANIACS | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Ac | 0.85% |
| valence electrons | - | 61.02% |
| who discovered | Friedrich Oskar Giesel (in 1902) | 0.85% |
Total Rarity Score: 1917.84
Rarity: #65/354