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The electronic configuration of sodium i...

The electronic configuration of sodium is

A

`[Ne]3s^(2)`

B

`[Ne]3s^(1)`

C

`[Ar] 4s^(1)`

D

`[Ar]4s^(2)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ATOMIC STRUCTURE-Level - I (MAIN) (Exercise - V (Electronic configuration , Aufbau principle, Pauli.s Exclusion principle and Hund.s rule ))
  1. Which of the following explains the sequence of filling electrons in d...

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  2. Nitrogen atom has 3 unpaired electrons in its ground state. It can be ...

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  3. The electronic configuration of sodium is

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  4. Which of the following configuration may represent the ground state of...

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  5. Electronic configuration of the element with atomic number 56 and mass...

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  6. (A) : The electronic configuration of boron cannot be 1s^(2)2s^(3) (...

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  7. The correct valence electronic configuration for Cu(Z=29) is

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  8. Which one of the following pairs of ions have the same electron config...

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  9. The (n+1) value for 4f sub shell is

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  10. The energy of the electron in the hydrogen atom depends on

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  11. After 3d-su level is completely filled the differentiating electron en...

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  12. The correct ground state electronic configuration of chromium atom is

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  13. The configuration 1s^(2)2s^(2)2p^(6)3s^(2)3p^(3) corresponds to

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  14. The configuration 1s^(2)2s^(1)2p(x)^(1)2p(y)^(1)2p(2)^(1) represents

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  15. The total number of .p. electrons present in phosphorous atom is

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  16. The valence electron configuration of an element with atomic number 23...

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  17. Mg^(2+) and Al^(3+) have same

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  18. The number of unpaired electrons in the valence shell of silicon is

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  19. (A) : AN orbital can.t have more than two electrons (R) : The first ...

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  20. Which of the following electronic configuration corresponds to an iner...

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