Which particle has no charge in an atom?

The particle in an atom that has no charge is the neutron. Neutrons are neutral particles found in the nucleus of an atom alongside protons, which are positively charged. The presence of neutrons helps to stabilize the nucleus, as they offset the repulsion between the positively charged protons due to their lack of charge.

In contrast, protons carry a positive charge, while electrons are negatively charged. Quarks, which are the fundamental constituents of protons and neutrons, also possess fractional electric charges but ultimately combine to form neutral neutrons and positively charged protons. Understanding the role of neutrons is crucial for grasping atomic structure, stability, and the behavior of elements in various chemical reactions.