| Content-Type | image/png |
|---|---|
| Content-Length | 2.15 kB |
| Size | 512x512 |
#97 Berkelium - rarity ZERO-KELVIN
| 1st ionization energy | 6.23 eV | 0.85% |
|---|---|---|
| appearance | Silvery white | 6.78% |
| atomic mass | 247 u | 1.69% |
| atomic number | 97 | 0.85% |
| atomic radius | 244 picometers (van der Waals radius) | 1.69% |
| cas number | 7440-40-6 | 0.85% |
| category | Inner transition metals | 23.73% |
| crystal structure | DHCP (Double hexagonal close packed) | 1.69% |
| density | 14.79 g/cm3 | 0.85% |
| electronegativity | 1.3 (Pauling scale) | 9.32% |
| electronic configuration | [Rn] 5f9 7s2 | 0.85% |
| electrons | 97 | 0.85% |
| electrons arrangement | 2, 8, 18, 32, 27, 8, 2 | 0.85% |
| main isotopes | 247Bk and 249Bk | 0.85% |
| melting point | 1259 K or 986 °C or 1807 °F | 0.85% |
| neutrons | 150 | 1.69% |
| position | Group: actinides, Period: 7, Block: f | 10.17% |
| rarity | ZERO-KELVIN | 33.33% |
| state | Solid | 72.88% |
| symbol | Bk | 0.85% |
| who discovered | Glenn T. Seaborg, Albert Ghiorso, Kenneth Street Jr. and Stanley G. Thompson (in 1949) | 0.85% |
Total Rarity Score: 1577.9
Rarity: #92/354