Question

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

• A. different of each nuclei
• B. nuclei created in explosion decays first
• C. nuclei created in the reactor decays first
• D. independent of time of creation

Answer 1

The correct option is D independent of time of creation

The half life $t_{1/2}$ and decay constant $\lambda$ remain constant, independent of time of creation of radioactive nuclei. So the probability of decay remains same.