न्यूट्रॉन
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(aangrezi:Neutron) paramanu ke aandar nyootr aaun ek aisa sookshm kan hai, jisaka dravyaman prot aaun ke dravyaman ke lagabhag barabar hota hai, lekin is par koee avesh nahian hota hai. arthath nyootr aaun ek udasin kan hai. nyootr aaun ki khoj 1932 ee. mean chaidavik ne veriliyam dhatu par α- kanoan se aghat karakar ki.
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