What is the decay constant for this isotope

Reference no: EM13994281

During the testing process for some pharmaceuticals, the drug is \"tagged\" with a radioactive material. This way researchers can determine if the pharmaceutical is going to other parts of the body than the intended target and what effect it has on the non-target areas. By adding this radioactive tag to the pharmaceutical, researchers can pinpoint all parts of the body and the concentration that accumulates in non-target areas.
One possible such tag is technetium-99, ⁹⁹Tc, which has a half-life of 6.05 hours.

1) How many 99Tc nuclei are required to give an activity of 1.6 ^oCi?

2) What is the decay constant for this isotope?

3) Suppose the drug containing the amount of ⁹⁹Tc calculated in part (a), were injected into the patient 1.35 hours after it was prepared, what would its activity be at that time?

Reference no: EM13994281

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