Question 1
The half life of a specific radionuclide is 8 days. How much of an 80 mg sample will be left after 24 days?
◦ 10 mg
◦ 2.7 mg
◦ 20 mg
◦ 40 mg
Question 2
The half life of a specific Tc-99m is 6 hours. How much of an 192 mg sample will have decayed after 30 hours?
◦ 186 mg
◦ 32 mg
◦ 160 mg
◦ 6 mg