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Question

Which has higher energy in an alpha decay?

A
Parent nucleus
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B
Daughter nuclei
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C
Alpha particle
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D
All have equal energy
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Solution

The correct option is A Parent nucleus
A reaction is spontaneous only when the products (daughter nuclei) have lesser energy state than the reactants (parent nucleus). So, the same is the case with alpha decay, which is a spontaneous process. Therefore, the parent nucleus has higher energy than its daughters.

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