A diagnostic dose of iodine-131 has a half-life of 8.0 days

PHYSICS · Subjective · A Level · Physics · Nuclear physics · Nuclear physics

Problem

A diagnostic dose of iodine-131 has a half-life of 8.0 days. After treatment, tests show that only 25 % of the original nuclei remain in the patient’s thyroid. Determine the elapsed time, in days, since the dose was administered.

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