Ru
Transition metal
Ruthenium
Z 44A 101mass 101.07
Atomic model
tap a particleEvery nucleon is drawn individually — 44 protons and 57 neutrons packed into the nucleus, with 44 electrons on shells outside.
44+1
Protons
Set the element — change this and it becomes a different atom.
570
Neutrons
Change only these and you get a different isotope of the same element.
44−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 101 (44 p + 57 n)
- Electron shells
- 2 · 8 · 18 · 14 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 101.07 u
Stability
Ruthenium has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab