Phosphorus-32 Is a Radioactive Isotope Used as a Tracer in the Liver

question 111

Multiple Choice

Phosphorus-32 is a radioactive isotope used as a tracer in the liver. How much phosphorus-32 was originally used if there is only 3.50 mg left in a sample after 288 h? (The half-life of phosphorus-32 is 14.3 days.)

• A)1.96 mg
• B)6.26 mg
• C)4.17 mg
• D)7.00 mg
• E)17.9 mg

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