What kind of particles are protons neutrons and electrons?

Protons and neutrons are baryons, which are composite particles made up of three quarks held together by the strong nuclear force, while electrons are fundamental particles known as leptons. Protons carry a positive charge, neutrons are neutral, and electrons have a negative charge. Together, these particles make up the atoms that form all matter in the universe. Their interactions are described by the standard model of particle physics.