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If the passing of three half-lives leaves 33.1 mg of

Question 9A radioisotope has a half-life of 7.5 hours. How many half lives have occured after 67.5 hours? a 7 half-lives b 8
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If the passing of three half-lives leaves 33.1 mg of a strontium-90 sample, how much was present in the beginning?
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2. asked by Mg Good
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A radioisotope has a half-life of 7.5 hours. How many half lives have occured after 67.5 hours?a 7 half-lives b 8 half-lives c 9
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Question 16A radioisotope has a half-life of 7.5 hours. How many half lives have occured after 67.5 hours? a 7 half-lives b 8
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Which statements best describe half-lives of radioactive isotopes? Check all that apply.The half-life varies depending on the
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If 50% of a radioactive element remains after 4000 years, what is the half-life?a 1 half-life b 2 half-lives c 3 half-lives d 4
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2. asked by JACK HAMMMMMMER
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If 50% of a radioactive element remains after 4000 years, what is the half-life?a. 1 half-life b. 2 half-lives c. 3 half-lives
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2. asked by Jackie66
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If 50% of a radioactive element remains after 4000 years, what is the half-life? a 1 half-life b 2 half-lives c 3 half-lives d 4
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If 50% of a radioactive element remains after 4000 years, what is the half-life?a 1 half-life b 2 half-lives c 3 half-lives d 4
1. 1 answer
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A radioisotope has a half-life of 7.5 hours. How many half lives have occured after 67.5 hours?a 7 half-lives b 8 half-lives c 9
1. 1 answer
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