Question

A nucleus with Z = 92 emits the following in a sequence: α, α, β^– , β^– , α, α, α, α, β^– , β^– , α, β⁺ , β⁺ , α. The Z of the resulting nucleus is

(a) 76 

(b) 78 

(c) 82 

(d) 74.

Answer 1

The correct answer is: