Multiple Choice
Carbon-11 radioactively decays by positron emission with a half-life of 20.4 minutes. If a dosage of carbon-11 is administered to a patient for a PET scan, what percentage of carbon-11 will remain in the patient's system after 81.6 min?
A) 75.0%
B) 12.5%
C) 87.5%
D) 25.0%
E) 6.25%
Correct Answer:
Verified
Correct Answer:
Verified
Q66: Which of the following statements regarding the
Q67: Strontium-90 has a half-life of 28 years.
Q68: Write a nuclear equation for the fusion
Q69: Which process decreases the atomic number of
Q70: In the initial steps of the decay
Q72: Carbon-14 decays by beta emission to form
Q73: Potassium-40 decays by beta emission to form
Q74: What is the missing symbol in the
Q75: Which of the following statements regarding nuclear
Q76: Compare the decay of a 100.0 mg