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Fluorine-18 Is a Radioisotope Widely Used in Positron Emission Tomography

Question 126

Multiple Choice

Fluorine-18 is a radioisotope widely used in positron emission tomography to investigate brain activity.The half-life is 109.8 minutes.How long will it take for 2.75 μg of 18F to decay to 500 ng?


A) 0.288 min
B) 270 min
C) 871 min
D) 2.06 × 103 min

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