Answer: Subatomic particle which orbits the nucleus is electron.
Step-by-step explanation:
Every atom contains three sub-atomic particles. These are protons, neutrons and electrons.
Protons contain a positive charge, neutrons have no charge and electrons have a negative charge.
Both protons and neutrons reside inside the nucleus of the atom whereas electrons reside outside the nucleus of atom and revolve around the nucleus.
Therefore, it is concluded that subatomic particle which orbits the nucleus is electron.