Antiparticle

An antiparticle is a subatomic particle that has the same mass as a corresponding particle but opposite electrical charge and other quantum numbers. For every type of particle, there exists an antiparticle: - For example, the antiparticle of the electron (which has a negative charge) is the positron (which has a positive charge). - Similarly, the antiparticle of a proton (which is positively charged) is the antiproton (which is negatively charged).