Radioactive isotope 131I with a physical half-life of 8.1 days, is ingested by patients with
healthy or with hyperactive (diseased) thyroids. On two consecutive days, a counter
positioned over the gland reads 10000 and 9136 counts per second (cps) for the healthy
person and 9500 and 7340 cps for the sick person. What are the biological half-lives of the
isotope in the thyroids of the patients?
Radioactive isotope 131I with a physical half-life of 8.1 days, is ingested by patients with healthy...