Q107 / 180 · AIIMS 2011 · Physics
$\mathrm{S}^{32}$ absorbs energy and decays into which element after two $\alpha$-emissions?
- ACarbon
- BAluminium
- COxygen
- Correct answerDMagnesium
Solution
The $\alpha$-emission of $\mathrm{S}^{32}$ is as follows :
$$
\begin{aligned}
& { }_{16} \mathrm{~S}^{32} \rightarrow{ }_{14} \mathrm{Si}^{28}+{ }_2 \mathrm{He}^4 \\
& { }_{14} \mathrm{Si}^{28} \rightarrow{ }_{12} \mathrm{Mg}^{24}+{ }_2 \mathrm{He}^4
\end{aligned}
$$
So after the emission of two $\alpha$-particle ${ }_{12} \mathrm{Mg}^{24}$ is formed.
Hence, the correct answer is option: 'D'.