Question
An element X decays into element Z by a two-step process:
$X \rightarrow Y + ^{4}_{2}\text{He}$
$Y \rightarrow Z + 2e^-$
An element X decays into element Z by a two-step process:
$X \rightarrow Y + ^{4}_{2}\text{He}$
$Y \rightarrow Z + 2e^-$