97Bk[247]
Berkelium
ActinidesHeavy, radioactive metals. Most of them are made only in laboratories.
[Rn] 5f⁹ 7s²
- Atomic number
- 97
- Atomic mass
- [247]
- Protons
- 97
- Neutrons
- 150
- Electrons
- 97
- Shells
- 2, 8, 18, 32, 27, 8, 2
- State at 25 °C
- Solid
- Position
- Period 7, f-block
Proton (+)Neutron (0)Electron (−)
Discovered byStanley Thompson, Albert Ghiorso and Glenn Seaborg, 1949Albert Ghiorso: 12 elementsGlenn T. Seaborg: 10 elementsStanley G. Thompson: 5 elements
Made at Berkeley, California, and named after the city.
Did you know?
- Berkelium was used as the target to make element 117, tennessine.
- Only tiny amounts have ever been made.
Where it's found
- Made only in laboratories, a few atoms at a time
What it's used for
- Scientific research only
Try it
There's no safe home experiment for Berkelium. Explore it with the animated atom above instead.