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NEET 1988 (AIPMT) · Radioactive Decays: Alpha, Beta, Gamma

Radioactive Decays: Alpha, Beta, Gamma question from NEET 1988 (AIPMT)

Q49NEET 1988 · AIPMTEasy

Radioactive Decays: Alpha, Beta, Gamma

The nucleus 48115Cd{}^{115}_{48}\text{Cd}, after two successive β\beta-decay will give

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Answer: (d)

  1. Each β−\beta^- decay keeps AA the same and raises ZZ by 1.
  2. After two decays: A=115A = 115, Z=48+2=50Z = 48 + 2 = 50.
  3. Z=50Z = 50 is tin, giving 50115Sn{}^{115}_{50}\text{Sn}.
  4. So the answer is (d) 50115Sn{}^{115}_{50}\text{Sn}.
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