Grade 12 · Science
Use a radioactive half-life model
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A parent isotope has a half-life of 2 days. What expected fraction remains after 8 days?
See the answer & why
8 ÷ 2 = 4 half-lives; ()4 = 1/16.
A little hint: A half-life is the time for the expected number of undecayed parent nuclei in a large sample to halve.
A half-life is the time for the expected number of undecayed parent nuclei in a large sample to halve.
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