Half life of iodine isotope for treating thyroid cancer is 8 days. A patient was exposed to 100 mg. What will be concentration of iodine in patient’s body after 32 days?
32 days equals 4 half lives for the iodine, since one half life is 8 days. So, the first half life goes from 100 to 50 mg, second from 50 to 25, third from 25 to 12.5, and fourth from 12.5 to 6.25
