Question: iodine - 123 is used to study thyroid gland function. this radioactive isotope decaya via first order kinetics with a half life of 13.1 hrs.

iodine - 123 is used to study thyroid gland function. this radioactive isotope decaya via first order kinetics with a half life of 13.1 hrs. how many hrs will it take for 41% of a sample of iodine to decay

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