In the type of radioactive decay are the mass numbers of the parent and daughter nuclei the same is the beta decay.
In the type of radioactive decay, during the beta decay , the parent nuclei and the daughter nuclei has the same mass number. but there is the difference in the atomic number , the atomic number is differ by the one in the beta decay. the beta decay are of two types : one is the positive beta decay and the other is negative beta decay.
In the positive beta decay the mass number is same for the parent and daughter nuclei and atomic number will increases by one. in the negative beta decay the mass number is same and the atomic number will decrease by one.
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