| Content-Type | image/png |
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| Content-Length | 7.15 kB |
| Size | 512x512 |
#55 Caesium - rarity ZERO-KELVIN
| 1st ionization energy | 3.894 eV | 0.85% |
|---|---|---|
| appearance | Silvery pale gold | 0.85% |
| atomic mass | 132.91 u | 0.85% |
| atomic number | 55 | 0.85% |
| atomic radius | 343 picometers (van der Waals radius) | 0.85% |
| boiling point | 944 K or 671 °C or 1240 °F | 0.85% |
| cas number | 7440-46-2 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Alkali metals | 5.08% |
| crystal structure | BCC (Body centered cubic) | 7.63% |
| density | 1.88 g/cm3 | 0.85% |
| electronegativity | 0.79 (Pauling scale) | 0.85% |
| electronic configuration | [Xe] 6s1 | 0.85% |
| electrons | 55 | 0.85% |
| electrons arrangement | 2, 8, 18, 18, 8, 1 | 0.85% |
| main isotopes | 133Cs | 0.85% |
| melting point | 301.7 K or 28.5 °C or 83.3 °F | 0.85% |
| neutrons | 78 | 0.85% |
| position | Group: 1, Period: 6, Block: s | 0.85% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Cs | 0.85% |
| valence electrons | 1 | 5.93% |
| who discovered | Gustav Kirchhoff and Robert Bunsen (in 1860) | 0.85% |
Total Rarity Score: 2180.02
Rarity: #8/354