Re
Transition metal
Rhenium
Z 75A 186mass 186.21
Atomic model
tap a particleEvery nucleon is drawn individually — 75 protons and 111 neutrons packed into the nucleus, with 75 electrons on shells outside.
75+1
Protons
Set the element — change this and it becomes a different atom.
1110
Neutrons
Change only these and you get a different isotope of the same element.
75−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 186 (75 p + 111 n)
- Electron shells
- 2 · 8 · 18 · 32 · 13 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 186.21 u
Stability
Rhenium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab