21. Nuclear Chemistry
Radioactive Half-Life
5:11 minutes
Problem 4
Textbook Question
Textbook QuestionFluorine-18 undergoes positron emission with a half-life of 1.10 x 10^2 minutes. If a patient is given a 250 mg dose for a PET scan, how long will it take for the amount of fluorine-18 to drop to 75 mg? (a) 56 minutes (b) 96 minutes (c) 132 minutes (d) 191 minutes
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