| Content-Type | image/png |
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| Content-Length | 2.15 kB |
| Size | 512x512 |
#69 Thulium - rarity BROWNIAN-MANIACS
| 1st ionization energy | 6.184 eV | 0.85% |
|---|---|---|
| appearance | Silvery gray metallic surface | 0.85% |
| atomic mass | 168.93 u | 0.85% |
| atomic number | 69 | 0.85% |
| atomic radius | 227 picometers (van der Waals radius) | 1.69% |
| boiling point | 2223 K or 1950 °C or 3542 °F | 0.85% |
| cas number | 7440-30-4 | 0.85% |
| category | Inner transition metals | 23.73% |
| crystal structure | HCP (hexagonal close packed) | 7.63% |
| density | 9.32 g/cm3 | 0.85% |
| electronegativity | 1.25 (Pauling scale) | 0.85% |
| electronic configuration | [Xe] 4f13 6s2 | 0.85% |
| electrons | 69 | 0.85% |
| electrons arrangement | 2, 8, 18, 31, 8, 2 | 0.85% |
| main isotopes | 169Tm | 0.85% |
| melting point | 1818 K or 1545 °C or 2813 °F | 0.85% |
| neutrons | 100 | 0.85% |
| position | Group: lanthanides, Period: 6, Block: f | 5.08% |
| rarity | BROWNIAN-MANIACS | 33.33% |
| state | Solid | 72.88% |
| symbol | Tm | 0.85% |
| who discovered | Per Teodor Cleve (in 1879) | 0.85% |
Total Rarity Score: 1988.36
Rarity: #45/354