P
Reactive nonmetal
Phosphorus
Z 15A 31mass 30.974
Atomic model
tap a particleEvery nucleon is drawn individually — 15 protons and 16 neutrons packed into the nucleus, with 15 electrons on shells outside.
15+1
Protons
Set the element — change this and it becomes a different atom.
160
Neutrons
Change only these and you get a different isotope of the same element.
15−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 31 (15 p + 16 n)
- Electron shells
- 2 · 8 · 5
- Valence shell
- 5 electrons
- Atomic mass
- 30.974 u