The uncharged particle found in the nucleus of an atom is called a neutron.
Neutrons play a crucial role in the stability of an atom. While protons, which are also located in the nucleus, carry a positive charge, neutrons are neutral, meaning they carry no charge at all. This neutrality allows neutrons to exist alongside protons without repelling them, despite the like charges of protons repelling each other.
In most atoms, the number of neutrons is roughly equal to the number of protons, but this can vary, resulting in different isotopes of an element. The presence of neutrons helps to buffer the positive charges of the protons, contributing to the overall stability of the nucleus.