Chemistry, 21.01.2020 05:31 365371

Fluorine-18 (18f) is a radioactive isotope use in a variety of medical imaging procedures including positron emission tomography (pet) scans.
fluorine-18 decays by positron emission with a half-life of 1.83 hours.
(1) when 18f undergoes positron emission, the product nucleus is,
a) 18o b) 19ne c) 14n d) 17f
(2) a typical dose of 18f used for a pet scan has an activity of 4.00 millicuries. how long will it take for 95% of the 18f to decay?
a) 1.74 hrs b) 5.49 min c) 8.13 minutes d) 7.91 hrs.

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