What are the three subatomic particles of an atom?

Protons, neutrons, and electrons are the three main subatomic particles found in an atom. Protons have a positive (+) charge. An easy way to remember this is to remember that both proton and positive start with the letter " P." Neutrons have no electrical charge.

Proton, neutron, and electron. The proton is positive, the neutron is neutral, and the election is negative.