| Content-Type | image/png |
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| Content-Length | 6.34 kB |
| Size | 512x512 |
#37 Rubidium - rarity ZERO-KELVIN
| 1st ionization energy | 4.177 eV | 0.85% |
|---|---|---|
| appearance | Grey white | 0.85% |
| atomic mass | 85.468 u | 0.85% |
| atomic number | 37 | 0.85% |
| atomic radius | 303 picometers (van der Waals radius) | 0.85% |
| boiling point | 961 K or 688 °C or 1270 °F | 0.85% |
| cas number | 7440-17-7 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Alkali metals | 5.08% |
| crystal structure | BCC (Body Centered Cubic) | 4.24% |
| density | 1.53 g/cm3 | 0.85% |
| electronegativity | 0.82 (Pauling scale) | 1.69% |
| electronic configuration | [Kr] 5s1 | 0.85% |
| electrons | 37 | 0.85% |
| electrons arrangement | 2, 8, 18, 8, 1 | 0.85% |
| main isotopes | 85Rb, 87Rb | 0.85% |
| melting point | 312.4 K or 39.3 °C or 102.7 °F | 0.85% |
| neutrons | 48 | 1.69% |
| position | Group: 1, Period: 5, Block: s | 0.85% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Rb | 0.85% |
| valence electrons | 1 | 5.93% |
| who discovered | Robert Bunsen and Gustav Kirchhoff (in 1861) | 0.85% |
Total Rarity Score: 2072.51
Rarity: #30/354