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Berkelium (Bk)
Atomic number 97 · Actinide
| Atomic number | 97 |
|---|---|
| Atomic mass | 247.0 u |
| Molar mass | 247.0 g/mol |
| Category | Actinide |
| Group / period / block | — / 7 / f |
| Electron configuration | [Rn] 5f9 7s2 |
| Electrons per shell | 2, 8, 18, 32, 27, 8, 2 |
| Density | 14.78 g/cm³ |
| First ionisation energy | 6.1978 eV |
| Melting point | 1259.15 K (986.00 °C) |
| Common oxidation states | +3 |
Uses
Research — making heavier elements
Discovery
1949, G.T.Seaborg, S.G.Tompson, A.Ghiorso