What defines a neutron?

A neutron is defined as a neutral particle found in the nucleus of an atom. This means it carries no electrical charge, distinguishing it from protons, which are positively charged, and electrons, which are negatively charged. Neutrons play a crucial role in the stability of an atom's nucleus, as they help to hold protons together despite their repulsive forces due to like charges. The presence of neutrons in the nucleus contributes to the atomic mass but does not affect the atom's overall charge. Understanding the role of neutrons is fundamental to grasping concepts regarding atomic structure and nuclear chemistry.