# NEET Physics Nuclei Questions Solved

Plutonium decays with a half-life of 24000 years. If the plutonium is stored for 72000 years, then the fraction of plutonium that remains is
(a) $\frac{1}{2}$           (b) $\frac{1}{3}$
(c) $\frac{1}{4}$           (d) $\frac{1}{8}$