A patient is injected with a solution of 1.2 mg of I¹³¹ to test for thyroid uptake. The injection occurred at 15:0 Monday. The procedure to assay the thyroid is at 09:00 Friday. I¹³¹ has a half-life of 192.5 hrs. How much of the original iodine is still in the patient at the Friday appointment?

Answer rating: 100% (QA)

Solution The radioactive decay obeys the following rule m t m 0 e t Where m t is t... View the full answer