Question

Which elements are isotopes of each other in the above sequence of reaction?

$X\overset{- \alpha }{ \rightarrow }Y\overset{- \beta }{ \rightarrow }Z\overset{- \beta }{ \rightarrow }W$

• A. $\text{X} \, \text{and} \, \text{W}$
• B. $\text{Y} \, \text{and} \, \text{Z}$
• C. $\text{X} \, \text{and} \, \text{Z}$
• D. None of these

Answer 1

Answer: (A)

Isotopes are formed by the emission of one $\alpha -$ and two $\beta -$ particles respectively.