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Let u denote one atomic unit .one atom o...

Let u denote one atomic unit .one atom of an element of mass number A has mass exactly equal A u

A

For any value ofA

B

only for A=1

C

Only for A=12

D

For any value of A provided the atom is stable

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The correct Answer is:
c
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D MUKHERJEE-MODERN PHYSICS-type -2
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  6. A and B are isotopes. B and C are isobars. All three are radioactive. ...

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  7. A nuclide A undergoes alpha-decay and another nuclides B undergoes bet...

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  8. The decay constant of a radioactive sample is lamda. Its half -life is...

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  9. The count rate from 100cm^(3) of a radioactive liquid is c. Some of th...

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  10. In Bohr model of the hydrogen atom, let R,v and E represent the radiu...

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  11. Let v(1) be the frequency of series limit of Lyman series, v(2) the fr...

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  12. In an e^(-) transition inside a hydrogen atom, orbital angular momentu...

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  13. If a hydrogen atom emit a photon of energy 12.1 eV , its orbital angul...

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  14. An electron with kinetic energy =E eV collides with a hydrogen atom in...

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  15. In an excited state of hydrogen like atom an electron has total energy...

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  16. Let the potential energy of the hydrogen atom in the ground state be z...

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  19. A beam of ultraviolet light of all wavelength passes through hydrogen ...

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  20. Whenever a hydrogen atom emits a photon in the Balmer series

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