Respuesta :
Radioactive decay occurs when an unstable nucleus loses energy
So the answer is the second choice
Answer:
All of the above
Explanation:
Hello,
In this case, since radioactive decay is the spontaneous breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus, we confirm that it is a spontaneous process as no initiator is required; therefore, no requirement of energy is done and it occurs when an unstable nucleus loses energy.
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