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What fraction of chlorine 36 remains undecayed after 2000000 years?
Wiki User
∙ 11y ago
the half-life of chlorine 36 is 400,000 years. 200,000 years is 1/2 of a half life.
in general, the formula to calculate the fraction of remaining amount is 1/2^n, where n represents the number of half-lives that have passed.
in this case, n=1/2, or 0.5, therefore the remaining fraction is 1/2^0.5. Use your calculator and you will find that this is 0.707, or about 71% of the original amount.
hope this helps
Wiki User
∙ 11y ago
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