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The activity of a radioactive isotope fa...

The activity of a radioactive isotope falls to `12.5%` in 90 days. Compute the half life and decay constatn of isotope.

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OP TANDON-RADIOACTIVITY AND NUCLEAR TRANSFORMATION -Problem Practices
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  3. The activity of a radioactive isotope falls to 12.5% in 90 days. Compu...

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  4. The radioactivity of an element was found to be one millicurie. What w...

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  5. A sample of a radioactive substance has 10^(6) radioactive nuclei. Its...

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  7. One gram of a radioactive element decays by beta-emission to 0.125 in ...

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  8. A wooden article found in a cave has only 40% as much .^(34)C activity...

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  9. One mu g of a radioactive iodine contained in thyroxine is injected in...

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  10. One gram of radium is reduced by 2 miligram in 5 yers by alpha-decay....

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  11. The activity of a radioactivity substance fall to 87.5% of the initial...

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  12. Starting with 1.0g of a radioactive sample, 0.25 g fo its is left afte...

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  13. A sample of wooden artifact is found to undergo 9 disintegration per m...

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  14. Xenon-127 has a half life of 36.4 days. How much of a sample of xenon ...

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  15. Calculate the ratio of (N)/(N(0)) after n hour has passed for a radioa...

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  16. The activity of the hair of an Egyptian mummy is 7 disintegration "min...

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  17. On analysis a sample of .^(238)U ore was found to contain 20.6g of .(8...

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  18. It is known that 1g of .^(226)Ra emits 11.6 xx 10^(17) atoms of alpha ...

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  19. A uranium mineral contains .^(238)U and .^(206)Pb in the ratio of 4 : ...

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