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
Q60: The half-life of iodine-131 is 8.1 days.
Q61: Which of the following isotopes would be
Q62: The reaction Q63: Carbon-14 has a half-life of 5730 yr. Q64: What product is formed when Q66: Which of the following statements regarding the Q67: Carbon-14 has a half-life of 5730 yr. Q68: Carbon-11 radioactively decays by positron emission with Q69: Why is radon gas dangerous? Q70: What product is formed when 
A)It reacts chemically
Unlock this Answer For Free Now!
View this answer and more for free by performing one of the following actions
Scan the QR code to install the App and get 2 free unlocks
Unlock quizzes for free by uploading documents