Proton

Definition

A proton is a subatomic particle found in the nucleus (center) of an atom. It has a positive electrical charge and contributes to the mass of the atom.

Related terms

Neutron:

A subatomic particle found in the nucleus with no electrical charge but contributes to the mass of the atom.

Electron:

A subatomic particle that orbits around the nucleus and carries a negative electrical charge.

Atomic Nucleus: The central part of an atom that contains protons and neutrons.