What negatively charged particle is responsible for carrying electricity in atoms?

The negatively charged particle responsible for carrying electricity in atoms is the electron. Electrons are subatomic particles that have a negative charge and are found in the outer regions of an atom, surrounding the nucleus, which contains protons and neutrons. When electrons move through a conductor, their flow constitutes electrical current.

In contrast, protons are positively charged and reside in the nucleus, contributing to the overall charge of the atom but not participating in the conduction of electricity. Neutrons have no charge and also reside in the nucleus, providing stability to the atom but again do not carry electric current. Ions are atoms or molecules that have gained or lost electrons, resulting in a net charge, but it is the electrons themselves that are the primary carriers of electricity. Therefore, in the context of electricity and atomic structure, electrons are indeed the key players in electrical conduction.