An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following…

An isotope of the original nucleus can be formed in a radioactive decay, with the emission of following particles.
  1. one $\alpha$ and one $\beta$
  2. one $\alpha$ and two $\beta$
  3. one $\alpha$ and four $\beta$
  4. four $\alpha$ and one $\beta$

Solution

${ }_{\mathrm{Z}} \mathrm{X}^{\mathrm{A}} \stackrel{\alpha}{\longrightarrow}{ }_{\mathrm{Z}-2} \mathrm{Y}^{\mathrm{A}-4} \stackrel{2 \beta^{-}}{\longrightarrow}{ }_{\mathrm{Z}} \mathrm{X}^{\mathrm{A}-4}$

Asked in: MHT CET 2023 (13 May Shift 1)

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