Uncharged building blocks of an atom that play a part in radio-activity. They can be found in the nucleus. Neutrons are particles that exist within the atomic nucleus with a charge that equals zero and a mass that equals one. Protons are always found along with neutrons in the atomic nucleus, and the total amount of neutrons within an atom influences its isotope. Neutrons work in maintaining the electrical charges from the protons in order to keep them away from destroying the atomic nucleus. Not only will this process preserve the atomic nucleus, but it will also allow a greater number of protons to be present in it.