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Chemistry, 22.04.2021 23:30 shayle24

strontium 90 has a half life of 28 years. If a sample of strontium is found to be 17.3% radioactive, how old is the sample?

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strontium 90 has a half life of 28 years. If a sample of strontium is found to be 17.3% radioactive,...
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