Iodine-131 is a convenient radioisotope to monitor thyroid activity in humans.It is a
Chapter 23, Problem 21.53(choose chapter or problem)
Iodine-131 is a convenient radioisotope to monitor thyroid activity in humans.It is a beta emitter with a half-life of8.02 days.The thyroid is the only gland in the body that uses iodine.A person undergoing a test of thyroid activity drinks a solution of NaI,in which only a small fraction ofthe iodide is radioactive.(a)Why is NaI a good choice for the source ofiodine? (b)Ifa Geiger counteris placed near the persons thyroid (which is near the neck) right after the sodium iodide solution is taken,what will the data look like as a function oftime? (c)A normal thyroid will take up about of the ingested iodide in a few hours.How long will it take for the radioactive iodide taken up and held by the thyroid to decay to of the original amount?
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