After three half-lives, what fraction of a radioactive sample remains.

Question

Chemistry

Amanda

24 June, 02:29

After three half-lives, what fraction of a radioactive sample remains.

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Answers (1)

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Ellie Ferguson · Answer 1

After1 half life 50 percent

after another half life 50 percent of 50 percent which is 25 percent

after 3 half lifes 50 percent of 50 percent of 50 percent which is 50 percent of 25 which is 12.5 percent

12.5 percent is left