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A radioactive substance decays to 1/16 ...

A radioactive substance decays to 1/16 th of its initial mass in 40 days. The half life of the substance, in days, is?

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R G PUBLICATION-NUCLEI-EXERCISE
  1. What is packing fraction and explain ?

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  2. What is meant by artificial radioactivity? Give some example?

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  3. State and explain the laws of radioactivity?

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  4. The half life of radioactive radon is 3.8 days. What is the time at th...

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  5. Calculate the nuclear mass density in 92U^238 Take R0=1.5 fermi and ma...

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  6. Express 16 mg mass into equivalent energy in electron volt.

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  7. Plot the binding energy per nucleon E(bn) versus the mass number A for...

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  8. What is a nuclear reactor. Describe its working with a schematic diagr...

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  9. What is fission? Give an example.

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  10. Deduce the equation R=R0e^(-lambdat)

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  11. Draw a graph of exponential decay of a radio active species.

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  12. What is half life? Deduce its relation with lambda.

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  13. Find the energy Q released in this reaction. 1H^2+1H^2 rarr Q+2He^4

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  14. What is the role of moderator in nculelar reactor?

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  15. Calculate the number of protons and neutrons in 92U^235

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  16. Describe the properties of nuclear force.

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  17. Why is the density of nucleus more than that of the atom?

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  18. A radioactive substance decays to 1/16 th of its initial mass in 40...

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  19. From the following nuclear rection find the value of X. 6C^11 rarr 5...

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  20. What is the angular momontum of electron in n^(th) orbit?

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