Rn
Noble gas
Radon
Z 86A 222mass 222
Atomic model
tap a particleEvery nucleon is drawn individually — 86 protons and 136 neutrons packed into the nucleus, with 86 electrons on shells outside.
86+1
Protons
Set the element — change this and it becomes a different atom.
1360
Neutrons
Change only these and you get a different isotope of the same element.
86−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 222 (86 p + 136 n)
- Electron shells
- 2 · 8 · 18 · 32 · 18 · 8
- Valence shell
- 8 electrons
- Atomic mass
- 222 u