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The electronic configuration of 1s^(2) 2...

The electronic configuration of `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(2)` corresponds to

A

Si

B

S

C

Na

D

Ar.

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The correct Answer is:
A
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DINESH PUBLICATION-ATOMIC STRUCTURE-Revision Questions
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  2. The valence orbital configuration of an element with atomic number 23 ...

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  3. The electronic configuration of 1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(2) cor...

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  4. The maximum number of electrons in p-orbital with n = 6, m = 0 is

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  6. When the azimuthal quantum number l = 1, the shape of the orbital will...

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  8. Sodium chloride imparts a yellow colour to the Bunsen flame .This ca...

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  9. The exact path of electron 2p orbital cannot be determined the above s...

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  10. For the energy levels in an atom , which one of the following statem...

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  11. Subsidiary quantum number specifies

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

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

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

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

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

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

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

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  19. No two electrons in atom can have

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  20. Number of neutrons in heavy hydrogen atom is

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