Multiple Choice
A sample of a radioacitive isotope has an activity of 80 μCi when produced. 60 min later when it is being used the activity has dropped to 10 μCi. What is the half-life of this isotope?
A) 60 min
B) 30 min
C) 20 min
D) 15 min
Correct Answer:

Verified
Correct Answer:
Verified
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