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The electronic configuration of chromium...

The electronic configuration of chromium (Z=24) is

A

`[Ar] 3d^(5) 4s^(1)`

B

`[Ar] 3d^(4) 4s^(2)`

C

`[Ar] 3d^(6)`

D

`[Ar] 3d^(5) 4s^(2)`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. The energy of the electron in the hydrogen atom is given by the expres...

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

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  3. The electronic configuration of chromium (Z=24) is

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

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  5. To which element does the following electronic configuration correspon...

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

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  7. Element with atomic number 38, belongs to

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  8. Among N^(-3), O^(-2), F^(-), Na^(+), Mg^(+2) and Al^(+3) (a) What is...

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  9. The number of unpaired electrons in the valance shell of silicon is

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  10. a) An orbital can hold only two electrons b) An orbital must have e...

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

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  12. The rule that explain the reason for chromium to have [Ar]3d^(5)4s^(1)...

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  13. Which of the following configuration is not possible ?

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  14. Which of the following ions is not isoelectronic with O^(2-)

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  15. Number of valence electrons in carbon is

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  16. The number of unpaired electrons in Fe^(3+) ion are

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  17. The number of unpaired electrons in 1s^(2) 2s^(2) 2p^(3) is

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  18. Bohr's basic idea of discrete energy levels in atorns and the of Photo...

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  19. The number of d-electrons retained in Fe^(3+) (At. No. of Fe = 26) ion...

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  20. Which of the following is the correct electronic configuration of Fe^(...

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