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Nuclei above bismuth-209 are unstable ir...

Nuclei above bismuth-209 are unstable irrespective of their neutron-proton ratio. Explain?

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The electrostatic force of repulsion between the protons is greater in magnitude than the attractive force between nucleons in heavy nuclei above bismuth-209. Thus, heavy nuclei are unstable
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Unstable nuclei attain stability through disintegration. The nuclear stability is related to neutron proton ratio (n//p) . For stable nuclei n//p ratio lies close to unity for elements with low atmoic numbers (20 or less) but it is more than 1 for nuclei having higher atomic numbers. Nuclei having n//p ratio either very high or low undergo nuclear transformation. When n//p ratio is higher than required for stability, the nuclei have the tendency to emit beta -rays. while when n//p ratio is lower than required for stability, the nuclei either emits alpha -particles or a positron or capture K -electron.

Unstable nuclei attain stability through disintegration. The nuclear stability is related to neutron proton ratio (n//p) . For stable nuclei n//p ratio lies close to unity for elements with low atmoic numbers (20 or less) but it is more than 1 for nuclei having higher atomic numbers. Nuclei having n//p ratio either very high or low undergo nuclear transformation. When n//p ratio is higher than required for stability, the nuclei have the tendency to emit beta -rays. while when n//p ratio is lower than required for stability, the nuclei either emits alpha -particles or a positron or capture K -electron.

MODERN PUBLICATION-NUCLEI-CONCEPTUAL QUESTIONS
  1. Nuclei above bismuth-209 are unstable irrespective of their neutron-pr...

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  2. What is the fate of a free neutron?

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  3. Two nuclei have mass number in the ratio 1:2. What is the ratio of the...

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  4. Why is the mass of a nucleus always less than the sum of the masses of...

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  5. Calculate the ratio of radii of two nuclei with mass numbers in ratio ...

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  6. Identify the pair of isotopes, isobars and isotones from the following...

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  7. Isolated proton does not decay into neutron but an isolated neutron ca...

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  8. Draw the curve showing the variation of binding energy per nucleon as ...

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  9. Why do all electrons emitted during beta - decay not have the same ene...

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  10. Why is density of a nucleus much more than the atomic density?

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  11. Why is nuclear density same for all nuclei?

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  12. Determine the number of electrons, proton and neutrons in the nucleus ...

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  13. The binding energies of two particles X and Y are 2.26 MeV/nucleon and...

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  14. Which is the most unstable elementary particle in an atom?

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  15. Nucleus contains protons and neutrons only but in beta decay, the elec...

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  16. During alpha decay of a nucleus, how does the neutron to proton ratio ...

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  17. During beta decay of a nucleus, how does the neutrons to proton ratio ...

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  18. A nucleus with mass number A =240 and BE//A = 7.6 Me V breaks i...

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  19. Calculate the energy in the given fusion reaction. ""(1)H^(2) + ""(1...

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  20. Why plutonium is not found in observable quantity in the universe?

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