Am
Actinide
Americium
Z 95A 243mass 243
Atomic model
tap a particleEvery nucleon is drawn individually — 95 protons and 148 neutrons packed into the nucleus, with 95 electrons on shells outside.
95+1
Protons
Set the element — change this and it becomes a different atom.
1480
Neutrons
Change only these and you get a different isotope of the same element.
95−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 243 (95 p + 148 n)
- Electron shells
- 2 · 8 · 18 · 32 · 25 · 8 · 2
- Valence shell
- 2 electrons
- Atomic mass
- 243 u