U
Actinide
Uranium
Z 92A 238mass 238.03
Atomic model
tap a particleEvery nucleon is drawn individually — 92 protons and 146 neutrons packed into the nucleus, with 92 electrons on shells outside.
92+1
Protons
Set the element — change this and it becomes a different atom.
1460
Neutrons
Change only these and you get a different isotope of the same element.
92−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 238 (92 p + 146 n)
- Electron shells
- 2 · 8 · 18 · 32 · 22 · 8 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 238.03 u