medical technician is working with the four samples of radionuclides listed in the table below. Initially, each sample contains 9.00 µmol of the radionuclide. rst, order the samples by decreasing initial radioactivity. Then calculate how long it will take for the amount of radionuclide in each sample to decrease to 1/32 the initial amount. time for amount of radionuclide to decrease to radionuclide initial sample radioactivity symbol half-life 1/32 of initial amount 67 Ga 31 78.0 hours v (choose on) D I hours 1 (highest) 2 64 Ga O minutes B 3.0 minutes 31 4 (lowest) 32 14. days O days C P (choose one) e 15 212 Pb O hours D 11. hours (choose one) 82

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