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For a nucleus to be stable, the correct ...

For a nucleus to be stable, the correct relation between neutron number `N` and proton number `Z` is.

A

N=Z

B

`N ge Z`

C

N lt Z

D

N gt Z

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The correct Answer is:
B
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In most stable nuclei neutron number N and proton number Z has the relation

A : During radioactive disintegration an alpha -particle and a beta -particle do not emit simultaneously from any nucleus. R : An alpha -particle emits from a nucleus when the N/Z ratio is less than the stability range (where N=number of neutrons and Z=number of protons in a nucleus. )

Staements I: Light nuclei are most stable if N =Z, while heavy nuclei are more stable if N gtZ. (N rarr number of neutrons, Z rarr number of protons) Staements II: As the number of protons increases in a nucleus, the Coulomb's repulsive forece increases, which tends to break the nucleus apart. So, to keep the nucleus apart. So, to keep the nucleus stable, more number of neutrons are needed which are neutral in nature.

AAKASH INSTITUTE-NUCLEI-Assignment Section A Objective (One option is correct )
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  2. The force acting between proton and proton inside the nucleus is.

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  3. For a nucleus to be stable, the correct relation between neutron numbe...

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  4. Two nucleons are at a separation of 1 xx 10^-15 m. The net force betwe...

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  5. If m,mn and mp are masses of .Z X^A nucleus, neutron and proton respec...

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  6. Average K.E of thermal neutron is of the order of (in KeV)

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  7. The control rod in a nuclear reactor is made of

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  8. Fusion reaction takes place at high temperature because

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  9. In a fission process, nucleus A divides into two nuclei B and C, their...

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  10. Fast neutrons can easily be slowed down by

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  11. A reactor is generating 1000 kW of power and 200 MeV of energy may be ...

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  12. In the nuclear reaction .92 U^238 rarr .z Th^A + .2He^4, the values of...

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  13. The number of neutrons released when .92 U^235 undergoes fission by ab...

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  14. Neutrino is a particle, which is

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  15. The binding energy of nucleus is a measure of its.

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  16. Heavy water is

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  17. 1 atomic mass unit is equal to

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  18. A nucleus of .84^210 Po originally at rest emits alpha particle with s...

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  19. The curve of blinding energy per nucleon as a function of atomic mass ...

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  20. The atoms of same element having same chemical properties but differen...

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