A nucleus n m X emits one α -particle and two β − particles. The resulting nucleus is

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

PhysicsNuclear PhysicsNEETNEET 2011 (Screening)

Options:

A ${ }_n^{m-6} Z$
B ${ }_n^{m-4} X$
C ${ }_{n-2}^{m-4} Y$
D ${ }_{n-4}^{m-6} Z$

Solution:

1787 Upvotes Verified Answer

The correct answer is: ${ }_n^{m-4} X$

${ }_n^m X \stackrel{\alpha}{\rightarrow}{ }_{n-2} X^{m-4} \stackrel{2 \beta}{\rightarrow}{ }_n X^{m-4}$

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