Asked by finley
A Geiger counter is used to measure the activity of a sample of iodine-131. Based on the data, what is the half-life of iodine-131?
A. 16 days
B. 8 days
C. 4 days
D. 12 days
A. 16 days
B. 8 days
C. 4 days
D. 12 days
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