Radioactive iodine-131 decays with a half-life of 8.0 days. A chemist obtains a fresh sample of iodine-131 and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to perform the experiment? The answer should be in days.
Radioactive iodine-131 decays with a half-life of 8.0 days. A chemist obtains a fresh sample of iodine-131 and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to perform the experiment? The answer should be in days.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter19: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 36E
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Radioactive iodine-131 decays with a half-life of 8.0 days. A chemist obtains a fresh sample of iodine-131 and measures its radioactivity. She then determines that to do an experiment, the radioactivity cannot fall below 25% of the initial measured value. How long does she have to perform the experiment? The answer should be in days.
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