Emedia Technician working with the four samples radionuclide: Listed the table below. Initially, each sample contains 25.00 µmol of the radionuclide. First, 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 1/4 of its initial amount.
Table: Radioactive Decay of Samples
Symbol Half-life (hours)
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A 9.0 minutes
B 2.0 hours
C 1.5 days
D 5.0 days