Berkelium (Bk)
Berkelium (Bk) is element 97, an actinide. Atomic mass 247, configuration [Rn] 5f⁹ 7s². Properties, isotopes, oxidation states, uses and history, with an interactive 3D atom model.
Key facts
| Atomic number | 97 |
|---|---|
| Symbol | Bk |
| Standard atomic weight | 247 |
| Category | Actinide |
| Period | 7 |
| State at room temperature | Solid |
| Electron configuration | [Rn] 5f⁹ 7s² |
| Valence electrons | 2 (Variable) |
| Common oxidation states | +3 |
| Common ions | No common ions |
| First ionization energy | 601 kJ/mol |
| Density | 14.78 g/cm³ |
| Melting point | 1050°C |
Common uses
- Synthesizing Tennessine (Element 117)
Where it matters
- Heavy Element Synthesis (Target material)
Hazards
- Highly radioactive
History
| Discovered | 1949 |
|---|---|
| Discovered by | Thompson, Ghiorso, Seaborg |
| Name | Berkeley, California |