Rg
Transition metal
Roentgenium
Z 111A 282mass 282
Atomic model
tap a particleEvery nucleon is drawn individually — 111 protons and 171 neutrons packed into the nucleus, with 111 electrons on shells outside.
111+1
Protons
Set the element — change this and it becomes a different atom.
1710
Neutrons
Change only these and you get a different isotope of the same element.
111−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 282 (111 p + 171 n)
- Electron shells
- 2 · 8 · 18 · 32 · 32 · 17 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 282 u
Stability
Roentgenium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab