The particle found in the nucleus of an atom that has no charge is called a neutron. Neutrons, along with protons, make up the atom's nucleus, while electrons orbit this nucleus in defined energy levels. The number of neutrons present helps determine the isotope of an element, impacting its nuclear stability and properties. In contrast, protons carry a positive charge and define the element's atomic number. The balance between neutrons and protons is critical for the overall stability of the atom, influencing radioactivity and the processes that govern nuclear reactions.