B
Metalloid
Boron
Z 5A 11mass 10.81
Atomic model
tap a particleEvery nucleon is drawn individually — 5 protons and 6 neutrons packed into the nucleus, with 5 electrons on shells outside.
5+1
Protons
Set the element — change this and it becomes a different atom.
60
Neutrons
Change only these and you get a different isotope of the same element.
5−1
Electrons
Sit outside the nucleus and decide the chemistry, not the element.
Element data
- Nucleons
- 11 (5 p + 6 n)
- Electron shells
- 2 · 3
- Valence shell
- 3 electrons
- Atomic mass
- 10.81 u
Stability
Boron has no measured radioactive isotope in this lab — its nuclei are stable, so decay must be shown as an illustration.
Open the decay lab