8. In the Three Mile Island accident radioactive Krypton-85 was released. Krypton-85 has a half life of 10.8 years. If 1,591 grams of Kr-85 was released, and all of the Krypton-85 fell
to the ground near the reactor, how many years would it take for it to decay to less
than 1 gram? Be sure to show your work. Complete the table provided below to help you
answer the question.
Years
0
10.8 21.6
Half
lives
0
1
2
3
4.
grams 1591
4