Question

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

$X\stackrel{-\alpha }{\to }Y\stackrel{-\beta }{\to }Z\stackrel{-\beta }{\to }W$

• 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.