Radioactive decay can be described by the following equation In A = In Ao – kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope strontium-90, k is 2.47 × 10-2 –1 years If the original amount of strontium-90 in a sample is 56.5 mg, how much strontium-90 remains after 23.7 years have passed? mg
Radioactive decay can be described by the following equation In A = In Ao – kt where Ao is the original amount of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance. For the radioactive isotope strontium-90, k is 2.47 × 10-2 –1 years If the original amount of strontium-90 in a sample is 56.5 mg, how much strontium-90 remains after 23.7 years have passed? mg
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter18: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 28E
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Transcribed Image Text:Radioactive decay can be described by the following equation
In A = In A, – kt
where Ao is the original amout of the substance, A is the amount of the substance remaining after time t, and k is a constant that is characteristic of the substance.
For the radioactive isotope strontium-90, k is 2.47 x 10-2
yеars
If the original amount of strontium-90 in a sample is 56.5 mg, how much strontium-90 remains after 23.7 years have passed?
mg
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