question_answer

Consider two nuclei of the same radioactive nuclide.  One of the nuclei was created in a supernova explosion 5 billion years ago. The other was created in a nuclear reactor 5 minutes ago. The probability of decay during the next time is                                                                                [KCET 2005]

A)            Different for each nuclei

B)            Nuclei created in explosion decays first

C)            Nuclei created in the reactor decays first

D)            Independent of the time of creation