Bk
Actinide
Berkelium
Z 97A 247mass 247
Atomic model
tap a particleEvery nucleon is drawn individually — 97 protons and 150 neutrons packed into the nucleus, with 97 electrons on shells outside.
97+1
Protons
Set the element — change this and it becomes a different atom.
1500
Neutrons
Change only these and you get a different isotope of the same element.
97−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 247 (97 p + 150 n)
- Electron shells
- 2 · 8 · 18 · 32 · 27 · 8 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 247 u
Stability
Berkelium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab