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NEET 2011
Exam
NEET
Year
2011
Subject
Physics
Chapter
Nuclear Physics

NEET 2011 · Physics · Nuclear Physics

A nucleus _n^m X emits one α -particle and two β^ - particles. The...

A nucleus nmX{ }_n^m X emits one α\alpha-particle and two β−\beta^{-}particles. The resulting nucleus is

Options

  1. Anm−6Z{ }_n^{m-6} Z
  2. Bnm−4X{ }_n^{m-4} X
  3. Cn−2m−4Y{ }_{n-2}^{m-4} Y
  4. Dn−4m−6Z{ }_{n-4}^{m-6} Z

Correct answer

B. nm−4X{ }_n^{m-4} X

Step-by-step solution

nmX→αn−2Xm−4→2βnXm−4{ }_n^m X \stackrel{\alpha}{\rightarrow}{ }_{n-2} X^{m-4} \stackrel{2 \beta}{\rightarrow}{ }_n X^{m-4}
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