An element X decays into element Z by two-step process. X → Y + ^{4}_{2}He Y → Z + 2 \e^{-} then :

Correct Answer is : X&Z are isotopes.

KCET 2016 Physics Solved Paper

Question : 56 of 60

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An element X decays into element Z by two-step process.
X → Y +

‌

He
Y → Z + 2 e− then :

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