Multiple Choice
Carbon- 11 is used in medical imaging. The half- life of this radioisotope is 20.4 min. What percentage of a sample remains after 60.0 min?
A) 13.0
B) 71.2
C) 34.0
D) 2.94
E) 5.28
Correct Answer:
Verified
Correct Answer:
Verified
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