SATHEE: nuclei Question 2

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Question: Q. 2. 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 $α$ and $β$ radioactivity but not for $r$ radioactivity.

(d) change for $β$ radioactivity but not for others.

[NCERT Exemplar]

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Solution:

Ans. Correct option : (b)

Explanation: As we know that, $α$ -particle : 2 unit of positive charge $β$ -particles : 1 unit positive charge $γ$ -particles : No dharge

Due to thisreasen, energy levels of the atom change for $α$ and $β$ bet not for others.

So the eleetronic energy level of the atom changes ine isission of $α$ and $β$ particle, but not in $γ$ decay.

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