Question

In the radioactive transformation given below,
$R\stackrel{\alpha }{\to }X\stackrel{\beta }{\to }Y\stackrel{\beta }{\to }Z$
the nuclei $R$ and $Z$ are,

• A. Isotopes
• B. Isobars
• C. Isomers
• D. Isotones

Answer 1

The correct option is A Isotopes

The individual reactions will be as shown below.

${}_Z{R}^A{\stackrel{\alpha }{\to }}_{z-2}{X}^{A-4}{+}_{2}H{e}^4$
${}_{z-2}{X}^{A-4}{\stackrel{\beta }{\to }}_{z-1}{Y}^{A-4}{+}_{-1}{e}^0$
${}_{z-1}{Y}^{A_4}{\stackrel{\beta }{\to }}_z{Z}^{A-4}{+}_{-1}{e}^0$

$R$ and $Z$ have same atomic number but different mass number. Therefore, they are Isotopes.

Hence, $\left(A\right)$ is the correct answer.