A 10-mu nv sample of iodine-131 is incorporated into a 1.0-mol sample of KI(s), and a second
1.0-mu mol sample of iodine-131 is incorporated into a 1.0-mol sample of PbI2(s). Then 1.0-
mmol samples of the two are tested for their activity. Will the activities of the two samples be the
same? Explain.
Solution
A = decay const x N , since cocn of I 131 introduced is same , N is same for both ,
hence activities of both solids are same.
1.0-mu mol sample of iodine-131 is incorporated into a 1.0-mol sample of PbI2(s). Then 1.0-
mmol samples of the two are tested for their activity. Will the activities of the two samples be the
same? Explain.
Solution
A = decay const x N , since cocn of I 131 introduced is same , N is same for both ,
hence activities of both solids are same.
