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97
Bk
[247]
Berkelium
Actinides · Group 11 · Period 6–7 (f)
Atomic properties
| Atomic number | 97 |
|---|---|
| Symbol | Bk |
| Standard atomic weight | [247] |
| Classification | Actinides |
| Group | f-block series |
| Period | 7 |
| Block | f-block (actinide) |
| Electron configuration | [Rn] 5f9 7s2 |
| Electronegativity (Pauling) | 1.30 |
| Common oxidation states | +3 |
Physical properties
| Phase at 20 °C | Solid |
|---|---|
| Density | 14.79 g/cm³ |
| Melting point | 1050 °C |
| Boiling point | 2627 °C |
| Discovered | 1949 |
| CAS number | — |