1-131 is used in medicine to diagnose and treat cancers of the thyroid gland. After 24.21 days, 36 micrograms remain of a radioactive sample of lodine -131 (which is a Beta and gamma emitter) with a half-life of 8.07 days. a). How many 1/2 lives have occurred in 24.21 days. b). How much lodine-131 was in the original sample?

Chemistry: The Molecular Science
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Author:John W. Moore, Conrad L. Stanitski
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Chapter18: Nuclear Chemistry
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1-131 is used in medicine to diagnose and treat cancers of the thyroid gland. After 24.21 days, 36 micrograms remain of a radioactive sample of lodine -131 (which is a Beta and gamma emitter) with a half-life of 8.07 days. a). How many 1/2 lives have occurred in 24.21 days. b). How much lodine-131 was in the original sample?

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