Q.4. The iodine isotope 133/ is used in hospitals for diagnosis of thyroid function. If 782 ug are ingested by a patient, a. Calculate the decay constant of 1-131. b. Calculate the initial number of I-131 nuclei. Calculate initial activity of I-131 ingested by the patient. d. Calculate the time (in days) required to reduce the amount of I-131 to 1 ug. Half-life of 133/ is 8.02 days Molar mass of 133/ is 130.906 g/mol C