| Content-Type | image/png |
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| Content-Length | 4.53 kB |
| Size | 512x512 |
#4 Beryllium - rarity ZERO-KELVIN
| 1st ionization energy | 9.323 eV | 0.85% |
|---|---|---|
| appearance | Metallic white-grey | 0.85% |
| atomic mass | 9.012 u | 0.85% |
| atomic number | 4 | 0.85% |
| atomic radius | 153 picometers (van der Waals radius) | 0.85% |
| boiling point | 2742 K or 2469 °C or 4476 °F | 0.85% |
| cas number | 7440-41-7 | 0.85% |
| cas number of (cl2) | - | 99.15% |
| category | Alkaline earth metals | 5.08% |
| crystal structure | HCP (Hexagonal closed packing) | 3.39% |
| density | 1.85 g/cm3 | 0.85% |
| electronegativity | 1.57 (Pauling scale) | 0.85% |
| electronic configuration | [He] 2s2 | 0.85% |
| electrons | 4 | 0.85% |
| electrons arrangement | 2, 2 | 0.85% |
| main isotopes | 9Be | 0.85% |
| melting point | 1560 K or 1287 °C or 2349 °F | 0.85% |
| neutrons | 5 | 0.85% |
| position | Group: 2, Period: 2, Block: s | 0.85% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 72.88% |
| sublimation point | - | 99.15% |
| symbol | Be | 0.85% |
| valence electrons | 2 | 7.63% |
| who discovered | Nicholas Louis Vauquelin in 1798 | 0.85% |
Total Rarity Score: 2192.67
Rarity: #7/354