The carbon-11 isotope has a half-life of 20.3 minutes. How long (in hours) will it take for 99.9999% of a carbon-11 sample to disappea

Chemistry: An Atoms First Approach
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ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
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Chapter18: The Nucleus: A Chemist's View
Section: Chapter Questions
Problem 28E
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The carbon-11 isotope has a half-life of 20.3 minutes. How long (in hours) will it take for 99.9999% of a carbon-11 sample to disappear? (c) Bismuth ?? 83 209 (atomic mass = 208.9804 u) is a radioactive isotope that decays into Thallium ?? 81 205 (204.9744 u) via a-particle (4.0026 u) emission. Determine the energy released in the ejection of an a-particle in units of MeV. 

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