The successive emission of one -particle followed by two -particles from a radioactive nucleus produ — Nuclear Chemistry and Radioactivity Chemistry Question

💡 Solution & Explanation

One $\alpha$ -emission drops the atomic number ($Z$) by $2$. Two $\beta^-$ -emissions increase $Z$ back by $2$. The net change in $Z$ is zero. Since the atomic number is the same but the mass has changed (by 4), the final nuclide is an isotope of the parent.