Question

The is at a higher energy level in an alpha decay.

• A. daughter nucleus
• B. parent nucleus
• C. alpha particle

Answer 1

The correct option is B parent nucleus

A reaction is spontanenous and one-way only if the daughter nucleus(products) have less energy than the parent nucleus(reactants). So, in the process of alpha decay, the parent nucleus should be at higher energy level for it to happen without a reversible case.