| Content-Type | image/png |
|---|---|
| Content-Length | 2.15 kB |
| Size | 512x512 |
#5 Boron - rarity ZERO-KELVIN
| 1st ionization energy | 8.298 eV | 33.33% |
|---|---|---|
| appearance | Black and brown | 33.33% |
| atomic mass | 10.81 u | 33.33% |
| atomic number | 5 | 33.33% |
| atomic radius | 192 picometers (van der Waals radius) | 33.33% |
| boiling point | 4200 K or 3927 °C or 7101 °F | 33.33% |
| cas number | 7440-42-8 | 33.33% |
| category | Metalloids | 33.33% |
| crystal structure | RHO (Rhombohedral) | 33.33% |
| density | 2.08 g/cm3 | 33.33% |
| electronegativity | 2.04 (Pauling scale) | 33.33% |
| electronic configuration | [He] 2s2 2p1 | 33.33% |
| electrons | 5 | 33.33% |
| electrons arrangement | 2, 3 | 33.33% |
| main isotopes | 11B | 33.33% |
| melting point | 2349 K or 2076 °C or 3769 °F | 33.33% |
| neutrons | 6 | 33.33% |
| position | Group: 13, Period: 2, Block: p | 33.33% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 66.67% |
| symbol | B | 33.33% |
| valence electrons | 3 | 33.33% |
| who discovered | 1). Joseph Louis Gay-Lussac and 2). Louis Jacques Thenard (Discovered in 1808) | 33.33% |
Total Rarity Score: 67.5
Rarity: #1/3