The neutron is a subatomic hadron pairticle that haes the seembol Error no symbol defined or Error no symbol defined, na net electric charge an a mass slichtly lairger nor that o a proton. Wi anly ane kent exception, (hydrogen-1), the nuclei o aw atoms consist o baith protons an neutrons, collectively referred tae as "nucleons". The nummer o protons in a nucleus is the atomic nummer an every atom o that element haes the same atomic nummer (the same nummer o protons). Neutrons are necessary within an atomic nucleus; protons can't stay boond wi ane anither alone (see diproton) acause thair mutual electromagnetic repulsion is stranger nor thair attractive nuclear force. Neutrons bind wi protons an ane anither in the nucleus via the nuclear force, stabilizin it. The nummer o neutrons in an atom is the neutron nummer an determines the isotope o an element. For example, the abundant carbon-12 isotope haes 6 protons an 6 neutrons, whauras the very rare radioactive carbon-14 isotope haes 6 protons an 8 neutrons. Elements mey be foond in naitur as anly ane isotope or wi as mony as 10 isotopes (Manganese an Tin, respectively).