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Science Clinic => Chemistry => Topic started by: tichca on Nov 18, 2019

Title: Fluorine-18 undergoes positron emission with a half-life of 1.10 102 minutes. If a patient is given ...
Post by: tichca on Nov 18, 2019

Question 1

Give the maximum age that can be estimated from radiocarbon dating.
◦ 1 000 000 years
◦ 100 000 years
◦ 5000 years
◦ 50 000 years
◦ 10 000 years

Question 2

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 83 mg? (Assume that none of the fluorine is excreted from the body.)
◦ 3.0 × 102 minutes
◦ 1.7 × 102 minutes
◦ 1.3 × 102 minutes
◦ 99 minutes
◦ 2.1 × 102 minutes

Title: Fluorine-18 undergoes positron emission with a half-life of 1.10 102 minutes. If a patient is given ...
Post by: aburgess on Nov 18, 2019

Answer 1

50 000 years

Answer 2

1.7 × 102 minutes