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The spectrum of He is expected to be sim...

The spectrum of `He` is expected to be similar to that of

A

H

B

`Li^(+)`

C

Na

D

`He^(+)`

Text Solution

Verified by Experts

The correct Answer is:
B
he has two electrons and therefore, should have spectrum as that of `Li^(+1)` (two electrons).
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DINESH PUBLICATION-ATOMIC STRUCTURE-Revision Questions
  1. Subsidiary quantum number specifies

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  2. As we move away from nucleus, the energy of orbit

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  3. The spectrum of He is expected to be similar to that of

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  4. The maximum number of electrons in a subshell is given by the expressi...

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  5. The atomic numbers of Ni and Cu are 28 and 29 respectively. The electr...

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  6. The correct set of quantum numbers for the unpaired electron of chlori...

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  7. Which of the following sets of quantum numbers is not possible?

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  8. The number of spherical nodes in 3p orbitals are

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  9. No two electrons in atom can have

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  10. Number of neutrons in heavy hydrogen atom is

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  11. If r is radius of first orbit , the radius of nth orbit of the H atom ...

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  12. The energy of a hydrogen atom in its ground state is -13.6 eV. The ene...

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  13. At 200^(@)C, hydrogen molecules have velocity 2.4 xx 10^(5) cm s^(-1) ...

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  14. An electron has a spin quantum number +1(1)/(2) and a magnetic quantum...

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  15. The electronic configuration of an atom/ion can be defined by the foll...

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  16. The number of electrons in 3d shell foe element with atomic number 26 ...

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  17. The value of Planck's constant in SI unit is

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  18. The total number of possible values of magnetic quantum number for the...

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  19. If the value of principal quantum number is 3, the total possible valu...

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  20. In a set of degenerate orbitals, the electrons distribute themselves t...

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