Si
Metalloid
Silicon
Z 14A 28mass 28.085
Atomic model
tap a particleEvery nucleon is drawn individually — 14 protons and 14 neutrons packed into the nucleus, with 14 electrons on shells outside.
14+1
Protons
Set the element — change this and it becomes a different atom.
140
Neutrons
Change only these and you get a different isotope of the same element.
14−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 28 (14 p + 14 n)
- Electron shells
- 2 · 8 · 4
- Valence shell
- 4 electrons
- Atomic mass
- 28.085 u
Stability
Silicon has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab