Concept:The particle in an atom that carries a negative charge is the electron.
Explanation:An atom is made up of three main subatomic particles: protons, neutrons, and electrons.
Protons carry a positive charge.
Neutrons carry no charge at all.
Electrons carry a negative charge.
A positron is not a normal part of an atom; it is the positively charged antiparticle of the electron.
Among the options given, the electron is the only negatively charged particle found in an atom.
Answer:A. Electron