question_answer

In a radioactive decay chain, the initial nucleus is At the end there are particles and particles which are emitted. it the end nucleus is  A and Z are given by-                 [JEE Main 12-Jan-2019 Evening]

A)

B)

C)

D)

Correct Answer: D

Solution :

[d] The mass number A of the end nucleus is

The atomic number Z of by conservation of charge is