Phosphorus-32, A $\beta$ -Emitter, Is a Radioactive Isotope Used in Many Biomedical Applications

question 154

Multiple Choice

Phosphorus-32, a $\beta$ -emitter, is a radioactive isotope used in many biomedical applications.How much time has passed if the ratio of 32S to 32P is 4 to 5?( The half-life of phosphorus-32 is 14.3 days.)

• A)11.4 days
• B)16.7 days
• C)4.60 days
• D)12.1 days
• E)16.9 days

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