Plutonium-240 (Pu-240) is a byproduct of the nuclear reaction that takes place in a reactor. It takes one thousand years for 10.0% of a 4.60-g sample to decay.
A. What is the half-life of PU-240?
B. How long will it take to reduce a 2.00-g sample to 15% of its original amount?
C. What is the rate of decay of a 5.00-g sample in g/year?