The number of radioactive nuclei present at the start of an
The number of radioactive nuclei present at the start of an experiment is 4.10 10^15. The number present 25 days later is 7.84 1014. Estimate the half-life of the nuclei?
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the number of radioactive nuclei present at the start of an experiment is 410 1015 the number present 25 days later is
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