Question

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

• A. Do not 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

Answer 1

Answer: (B)

Change for $\alpha$ and $\beta$ radioactivity but not for $\gamma$ - radioactivity.

Answer 2

: As an alpha particle carries 2 units of positive charge. And a beta particle carries one unit of negative charge and $\gamma$particle carries no charge. Therefore electronic energy levels of the atom change for $\alpha$and $\beta$radioactivity. But not for $\gamma -$radioactivity