The process of spontaneous breakdown of an atomic nucleus and the release of energy and matter from the nucleus is called Radioactive Decay. Radioactive isotopes are elements with a very unstable nucleus. They are always trying to stabilize and to do that they release energy and transmute into other elements which are stable. Transmutation can occur in nature and by artificial means.
Based on the former evidence, the answer to this question is:
Radioactive decay happens when one kind of atom becomes another kind.
Carbon-14 decays into nitrogen-14.
Radioactive elements occur in nature.
I believe that it means we never know our full potential, and that we never know how great we are till we are asked to show it.
Answer:
Maybe A. as an appositive with essential information
Explanation: