which aspect must be taken into consideration when creating a model of radioactive decay?

Question

A. there must be a predictable and reversible change that occurs
B. there must not be any particles or energy emitted from the nucleus
C. there must be a way for unstable nuclei to become stable nuclei
D. there must not be any changes to element in question

Answer 1

C. there must be a way for unstable nuclei to become stable nuclei