Sn
Post-transition metal
Tin
Z 50A 119mass 118.71
Atomic model
tap a particleEvery nucleon is drawn individually — 50 protons and 69 neutrons packed into the nucleus, with 50 electrons on shells outside.
50+1
Protons
Set the element — change this and it becomes a different atom.
690
Neutrons
Change only these and you get a different isotope of the same element.
50−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 119 (50 p + 69 n)
- Electron shells
- 2 · 8 · 18 · 18 · 4
- Valence shell
- 4 electrons
- Atomic mass
- 118.71 u
Stability
Tin has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab