Fe
Transition metal
Iron
Z 26A 56mass 55.845
Atomic model
tap a particleEvery nucleon is drawn individually — 26 protons and 30 neutrons packed into the nucleus, with 26 electrons on shells outside.
26+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.
26−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 56 (26 p + 30 n)
- Electron shells
- 2 · 8 · 14 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 55.845 u
Stability
Iron has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab