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Number of unpaired electrons in the elec...

Number of unpaired electrons in the electronic configuration `1s ^(2) , 2s ^() . 2a ^(4)` is

A

2

B

3

C

4

D

6

Text Solution

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Number of unpaired electrons in `1s ^(2), 2s ^(2), 2p ^(4)` are 2.
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OMEGA PUBLICATION-STRUCTURE OF ATOM -MULTIPLE CHOICE QUESTIONS (MCQ s)
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  2. No two electrons in an atom will have all the four quantum numbers sam...

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  3. The correct order of increasing energy of atomic orbitals is

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  4. The energy of an electron in nth orbit of hydrogen atom is

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  5. The triad of nuclei that is isotonic is

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  6. Bohr's model can explain

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  7. If the value of l = 2, what will be the value of principal quantum num...

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  8. Rutherford's experiment on scattering of alpha particles showed for th...

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  9. 3d-orbitals have

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  10. Number of unpaired electrons in the electronic configuration 1s ^(2) ,...

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  11. The two electrons in an orbital have different

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  12. The principal which gives a way to fill the electrons in the available...

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  13. Number of unpaired electrons in Nat is

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  14. f -sub-shell is characterised by:

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  15. When the 3d orbital is complete, the new electron will enter the

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  16. Energy of atomic orbitals in a particular shell is in the order

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  17. The set of quantum numbers not applicable for an electron in an atom i...

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  18. Indicate the number of unpaired electron in Cr

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  19. The limiting line in Paschen series corresponds to

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  20. The configuration of Fe^(3+) ion in the ground state

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