1.

In an `alpha` -decay, the kinetic energy of `alpha`-particles is `48 MeV` and `Q` value of the reaction is `50 MeV`. The mass number of the mother nucleus is (assume that daughter nucleus is in ground state)A. 96B. 100C. 104D. none of these

Answer» Correct Answer - B
`K_(alpha) = ((A-4)/(A)) Q`
`48 = ((A-4)/(A)) 50`
`48A = 50A - 200 rArr 200 = 2A rArr A = 100`


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