Mn
Transition metal
Manganese
Z 25A 55mass 54.938
Atomic model
tap a particleEvery nucleon is drawn individually — 25 protons and 30 neutrons packed into the nucleus, with 25 electrons on shells outside.
25+1
Protons
Set the element — change this and it becomes a different atom.
300
Neutrons
Change only these and you get a different isotope of the same element.
25−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 55 (25 p + 30 n)
- Electron shells
- 2 · 8 · 13 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 54.938 u
Stability
Manganese has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab