The radioactive isotope gallium-67 is used in medical imaging as indicated on the table above. If 41.2 milligrams of gallium-67 is administered to a patient, how many milligrams are left in the body after 391.5 hours?
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3 hours. Given half-life (t1/2) = 78.3 hours Decay constant (k) = ln(2) / t1/2 k = ln(2) / 78.3 k ≈ 8.85 x 10^-3 1/hour Show more…
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