Question Detail
Question
The radioactive isotope iodine-131 has a half-life of approximately 8 days. A hospital physicist received a quantity of this material for use on a certain day. What fraction of it would still have remained if he had not been able to use it until 8 days after he received it?
Correct Answer
Option C is the correct answer.
Detailed Explanation
After one half-life (8 days), half of the material remains. Fraction remaining = 1/2.
Hint
One half-life means half remains.