Bi
Post-transition metal
Bismuth
Z 83A 209mass 208.98
Atomic model
tap a particleEvery nucleon is drawn individually — 83 protons and 126 neutrons packed into the nucleus, with 83 electrons on shells outside.
83+1
Protons
Set the element — change this and it becomes a different atom.
1260
Neutrons
Change only these and you get a different isotope of the same element.
83−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 209 (83 p + 126 n)
- Electron shells
- 2 · 8 · 18 · 32 · 18 · 5
- Valence shell
- 5 electrons
- Atomic mass
- 208.98 u