Wadarta guud ee neutrons iyo neutrons ee nucleus waa qiyaastii u dhiganta 1.07 3√A fm, halkaas oo A waa tirada guud ee nucleons. Tani waa wax badan ka yar radius ee atom, taas oo ku saabsan amarka of 105 fm. nucleons waxaa ku xiran by a gaaban kala duwan soo jiidashada iman kara loo yaqaan xoogga xoogga haray. At masaafo yar ka badan 2.5 fm xoogga this waa wax badan ka xoog badan ciidanka electrostatic in sababi protons positively eedeeyay in ay iska caabiyaan midba midka kale. Atoms of element isku leeyihiin tiro isku mid ah ee protons, loo yaqaan tirada atomic. gudahood element hal, tirada neutrons kala duwanaan karaan, waxaa lagu go'aamiyaa element ee neutrons. Tirada guud ee neutrons iyo protons go'aamiyaa tirada guud ee nucleus.
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