When a nucleus in an atom undergoes a radioactive decay, the electronic energy levels of the atom -

(A) Do no change for any type of radioactivity.
(B) Change for `alpha` and `beta` -radioactivity but not for `gamma`-radioactivity.
(C) Change for `alpha`-radioactivity but not for others.
(D) Change for `beta`-radioactivity but not for others.

Options

A. do not change for any tppe of radioactivity
B. change for `alpha and beta` radioactivity but not for `gamma-`radioactivity.
C. change for `alpha`-radioactivity but not for others.
D. change for `beta`-radioactivity but not for others

Answer

B

Explanation

As an alpha particle carries 2 units of postive charge, and beta particle carries one unit of negative charge and `gamma` particle carries no charge, therefore electronic energy levels of the atom chage for `alpha and beta` radioactivity, but no for `gamma`- radioactivity.