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Question: Answered & Verified by Expert
$\longrightarrow{ }_{82} \mathrm{~Pb}^{208}$. The number of $\alpha$
and $\beta$ -particles emitted during the above reaction is
ChemistryChemical KineticsJEE Main
Options:
  • A $8 \alpha$ and $4 \beta$
  • B $8 \alpha$ and $16 \beta$
  • C $4 \alpha$ and $2 \beta$
  • D $6 \alpha$ and $4 \beta$
Solution:
1531 Upvotes Verified Answer
The correct answer is: $6 \alpha$ and $4 \beta$
No. of $\alpha$ particles $=\frac{232-208}{4}=\frac{24}{4}=6 \alpha$
No. of $\beta$ particles $=2 \times 6-(90-82)$
$$
\begin{array}{l}
=12-8 \\
=4 \beta
\end{array}
$$
Hence, $6 \alpha$ and $4 \beta$ particles are emitted.

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