Lu
Lanthanide
Lutetium
Z 71A 175mass 174.97
Atomic model
tap a particleEvery nucleon is drawn individually — 71 protons and 104 neutrons packed into the nucleus, with 71 electrons on shells outside.
71+1
Protons
Set the element — change this and it becomes a different atom.
1040
Neutrons
Change only these and you get a different isotope of the same element.
71−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 175 (71 p + 104 n)
- Electron shells
- 2 · 8 · 18 · 32 · 9 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 174.97 u
Stability
Lutetium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab