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After 24 hours, only 0.125 g out of the ...

After 24 hours, only 0.125 g out of the initial quantity of 1g of a radioisotope remains behind. what is half-life period?

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`N_(0)` N=0.125 g ,t=24 hours
`therefore lambda =(2.303)/(t)log(N_(0))/(N)`
`=(2.303)/(24) log (1)/(0.25)`
`therefore t^(1//2) =(0.693)/(lambda)=(0.639)/(0.866)=7.99` hours
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NCERT BANGLISH-NUCLEAR CHEMISTRY-SELF EVALUATION
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  3. The most penetrating radiations are

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  6. The reaction 5^(B^(8))rarr4^(Be^(8)) takes place due to

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  7. Radioactivity is due to

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  8. In the following radioactive decay, 92A^(xA^(232))rarr89^(y^(220)), ho...

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  9. 92^(U^(235)) nucleus absorbs a neutron and disintegrates into 54^(Xe^(...

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  10. Loss of a beta-particle is equivalent to

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  11. Which of the following is used as neutron absorber in the nuclear reac...

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  12. Define radio activity.

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  13. What is half life period.

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  14. Write two difference between chemical reaction and nuclear reaction.

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  15. What is Q value of a nuclear reaction?

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  16. What are the types of nuclear reaction. Give example for each type.

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  17. Explain the principle behind the Hydrogen bomb.

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  18. State two uses of radio carbon dating.

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  19. What is binding energy of Nucleus?

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  20. What is radioactivity? How was the phenomenon discovered?

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  21. What is nuclear fission? What are controlled and uncontrolled fission ...

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