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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 -1 For the radioactive isotope iodine-123, k is 5.21 × 10-² hours If the original amount of iodine-123 in a sample is 71.9 mg, how much iodine-123 remains after 15.4 hours have passed?

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 -1 For the radioactive isotope iodine-123, k is 5.21 × 10-² hours If the original amount of iodine-123 in a sample is 71.9 mg, how much iodine-123 remains after 15.4 hours have passed?

Chemistry: An Atoms First Approach
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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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. -1 For the radioactive isotope iodine-123, k is 5.21 × 10-2 hours If the original amount of iodine-123 in a sample is 71.9 mg, how much iodine-123 remains after 15.4 hours have passed? mg
Transcribed Image Text: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. -1 For the radioactive isotope iodine-123, k is 5.21 × 10-2 hours If the original amount of iodine-123 in a sample is 71.9 mg, how much iodine-123 remains after 15.4 hours have passed? mg
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