The Decay Constant of a Radioactive Isotope Is 1

question 137

Multiple Choice

The decay constant of a radioactive isotope is 1.60 × 10^-3 s^-1.At a given instant,the number of atoms of the radioactive isotope is 1.85 × 10¹².How many atoms of the isotope remain after a time interval of 30.0 minutes?

• A)1.04 × 10¹¹
• B)1.14 × 10¹¹
• C)1.26 × 10¹¹
• D)1.38 × 10¹¹
• E)1.52 × 10¹¹

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