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Gurjeet Gurjeet
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7 years ago
Exposure to radioactive material is considered safe after 10 half-lives because
A) less than a tenth of 1% of the material remains.
B) less than 12.5% of the material remains.
C) ten is an even number.
D) all of the material will have decayed at that time.
Textbook 
Chemistry for Changing Times

Chemistry for Changing Times


Edition: 13th
Authors:
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- University of Colorado
- Part-time TA
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tropicauxtropicaux
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7 years ago
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Gurjeet Author
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7 years ago
You're an amazing chem teacher, thanks
- University of Colorado
- Part-time TA
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