Question
Question: A nucleus of an element \(84X^{202}\)emits an α-particle first, a β-particle next and then a gamma p...
A nucleus of an element 84X202emits an α-particle first, a β-particle next and then a gamma photon. The final nucleus formed has an atomic number.
A
200
B
199
C
83
D
198
Answer
83
Explanation
Solution
84X202→α−decay82Y198+2He4and
82Y198→β−decay83Z198+−1⥂β0