AIIMS 2012 Physics Radioactive Decay MCQ Question with Solution

The nucleus $_{Z}^{A}X$ emits one α particle and 2β-particles. The resulting nucleus is

A

$_{Z^{-4}}^{A^{-4}}Y$

B

$_{Z^{-4}}^{A^{-4}}Z$

C

$_{Z^{-2}}^{A^{-4}}Z$

D

$_{Z^{-2}}^{A^{-4}}X$

Correct Answer

Option D

Detailed Explanation

Emission of α-particle decreases the mass number and the atomic number by 4 and 2 respectively. Emission of β-particle increases the atomic number by 1 while the mass number remains unchanged. After the emission of the one α-particle and two β-particles Decreases in mass number = 4 - 0 = 4 Decreases in atomic number = 2 - 2 = 0

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AIIMS 2012 Physics Radioactive Decay MCQ Question

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