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NEET 2009 (AIPMT) · Radioactive Decays: Alpha, Beta, Gamma

Radioactive Decays: Alpha, Beta, Gamma question from NEET 2009 (AIPMT)

Q29NEET 2009 · AIPMTEasy

Radioactive Decays: Alpha, Beta, Gamma

In the nuclear decay given below

ZAX→Z+1AY→Z−1A−4B∗→Z−1A−4B,{}^{A}_{Z}X \rightarrow {}^{A}_{Z+1}Y \rightarrow {}^{A-4}_{Z-1}B^{*} \rightarrow {}^{A-4}_{Z-1}B,

the particles emitted in the sequence are

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Answer: (d)

  1. X→YX \to Y: ZZ up by 1, AA same, so β−\beta^-.
  2. Y→B∗Y \to B^*: AA down by 4, ZZ down by 2, so α\alpha.
  3. B∗→BB^* \to B: only de-excitation, so γ\gamma.
  4. So the answer is (d) β,α,γ\beta, \alpha, \gamma.
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