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Electrons never pair, if there are empty...

Electrons never pair, if there are empty orbitals in a given sub-shell. This is

A

Aufbau principle

B

Pauli's exclusion principle

C

Hund's rule of maximum multiplicity

D

Heisenberg's uncertainity principle

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The correct Answer is:
C
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. Which of the following sets of quantum numbers is correct for an elect...

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  2. No two electrons in an orbital can have parallel spin. This statement ...

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  3. Electrons never pair, if there are empty orbitals in a given sub-shell...

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  4. Which of the following explains the sequence of filling electrons in d...

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

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  6. The electronic cnfiguration of sodium is

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  7. Which of the following represent an acetal/ ketal

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

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  9. The electronic configuration of Sodium is 1s^(2) 2s^(2) 2p^(6) 3s^(1) ...

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  10. The correct valence electronic configuration for Cu(z = 29) is

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  11. Which one of the following pairs of ions have the same electronic conf...

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  12. The (n+l) value for 4f sub-shell is

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  13. The energy of the electron in the hydrogen atom is given by the expres...

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

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

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

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

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

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  19. Element with atomic number 38, belongs to

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

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