A Sample of a Radioactive Isotope Is Found to Have

question 72

Multiple Choice

A sample of a radioactive isotope is found to have lost 26.6% of its original activity after 3.21 days.What is the rate constant for decay of this isotope?

• A) 0.096 d−1
• B) 0.413 d−1
• C) 0.993 d−1
• D) 0.0735 d−1
• E) 1.34 d−1