When a nucleus in an atom undergoes

Question:

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

(a) do not change for any type of radioactivity

(b) change for α and β radioactivity but not for γ-radioactivity

(c) change for α-radioactivity but not for others

(d) change for β-radioactivity but not for others

Solution:

(b) change for α and β radioactivity but not for γ-radioactivity

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