Fluorine-18 undergoes positron emission with a half-life of 1.10 × 10² minutes. If a patient is given a 248 mg dose for a PET scan, how long will it take for the amount of fluorine-18 to drop to 63 mg? (Assume that none of the fluorine is excreted from the body.) 217 min 174min 79.8 min

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Writing and Balancing Nuclear Equations

A nuclear equation is a symbolic representation of a nuclear reaction using certain symbols. It is studied in nuclear chemistry and nuclear physics.