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Although most natural potassium nuclei are stable K (93.3%) or **K (6.7%) nuclei, about 0.0117% are radioactive *°K nuclei, which have a half-life of 1.26 billion years. If you were worrie about 40K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait?

Although most natural potassium nuclei are stable K (93.3%) or **K (6.7%) nuclei, about 0.0117% are radioactive *°K nuclei, which have a half-life of 1.26 billion years. If you were worrie about 40K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait?

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter19: Nuclear Chemistry
Section: Chapter Questions
Problem 51AP
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Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6.7%) nuclei, about 0.0117% are radioactive 40K nuclei, which have a half-life of 1.26 billion years. If you were worried about 4°K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait? time to wait = years ce is +/-2% J m/s
Transcribed Image Text:Although most natural potassium nuclei are stable 39K (93.3%) or 41K (6.7%) nuclei, about 0.0117% are radioactive 40K nuclei, which have a half-life of 1.26 billion years. If you were worried about 4°K radioactivity and wanted to wait for 97 % of the 40K in the environment to decay away, how long would you have to wait? time to wait = years ce is +/-2% J m/s
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