Q98. Which of the following best defines the phenomenon of radioactivity?Physics — NUST Mock By Dogers 5 — Question 98 of 200A. The spontaneous disintegration of an unstable atomic nucleus.B. The packing fraction of an atomic nucleus.C. The binding energy holding a nucleus together.D. The splitting of a heavy nucleus when struck by a neutron.Practice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →