Co
Transition metal
Cobalt
Z 27A 59mass 58.933
Atomic model
tap a particleEvery nucleon is drawn individually — 27 protons and 32 neutrons packed into the nucleus, with 27 electrons on shells outside.
27+1
Protons
Set the element — change this and it becomes a different atom.
320
Neutrons
Change only these and you get a different isotope of the same element.
27−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 59 (27 p + 32 n)
- Electron shells
- 2 · 8 · 15 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 58.933 u