Nitrogen-13 has a biologic half-life of 2.84 minutes and emits positrons.    If a patient is injected with 500.0 micrograms of nitrogen-13 via radio-isopotoped ammonia(aq)  molecules for a PET exam, how many micrograms of N-13 will remain in the person after three half-lives?

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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.