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A patient is given 0.045 g of technetium-99m, a radioactive isotope with a half-life of about 6.0 hours.How long does it take for the radioactive

A patient is given 0.045 μg of technetium-99m, a radioactive isotope with a half-life of about 6.0 hours.How long does it take for the radioactive isotope to decay to 6.1×10−3μg ? (Assume no excretion of the nuclide from the body.)

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