An elementary particle with a positive charge, found in the nucleus of an atom. Note: A proton is over a thousand times heavier than an electron. Note: Protons and neutrons make up most of an atom's mass. read more
This is made up of protons and neutrons, this part of the atomcontains nearly all the mass. This small particle of an atom thatcarries a negative charge. read more
protons have a positive charge, neutrons have no charge, and elextrons have a negative charge. read more