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Critical thinking and discussion questions. Use complete sentences, correct spelling, and the information presented in chapter 18 to answer the questions below.


In the chart of radioactive decay shown below:
(a) how many half-lives have elapsed by time?
(b) how many half-lives have elapsed by time?

100 75- 50 25 12.5- (a) (b) Half lives elapsed Percent of elements present
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Transcribed Image Text:100 75- 50 25 12.5- (a) (b) Half lives elapsed Percent of elements present
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