Home
Class 11
CHEMISTRY
What is Hund's rule ?...

What is Hund's rule ?

Text Solution

Verified by Experts

Hund.s rule : This rule deals with the filling of electrons in degenerate orbitals. It states "Pairing of electrons in the orbitals belonging to the same subshell (p. d or f) does not take place until each orbital belonging to that subshell has got one electron each (i.e.,) all the orbitals are singly occu pied".
Since there are three .p, five .d. and seven .f orbitals, therefore the pairing of electrons will start in the p, d and forbitals with the entry of `4^(th),6^(th)` and `8^(th)` electrons respectively.
`Ex:""_(8)O` electronic configuration is
Promotional Banner

Topper's Solved these Questions

  • ATOMIC STRUCTURE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise SHORT ANSWER QUESTIONS |21 Videos

  • ATOMIC STRUCTURE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS |15 Videos

  • ATOMIC STRUCTURE

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise Important Questions|28 Videos

  • CHEMICAL EQUILIBRIUM AND ACIDS BASES

    VIKRAM PUBLICATION ( ANDHRA PUBLICATION)|Exercise LONG ANSWER QUESTIONS |31 Videos

Similar Questions

Explore conceptually related problems

For Manganese atom, assuming that Hund's rule is to valid for l=2 subshell predict the unpaired electrons and elctron pairs in that subshell of atom

Explain Hund's rule with an example .

State Hund's rule and Aufbau principle.

State and explain Hunds's rule of maximum multiplicity.

What is Octet rule ? Briefly explain its significance and limitations.

Which of the following electronic configuration represents the violation of both Aufbaur principle and Hund's rule ?

What is octet rule ?

What is octet rule? How do you appreciate role of the 'octet rule' in explaining the chemical properties of elements ?

Electronic configuration of multielectron atoms can be written by the use of four quantum numbers and also by following certain principles. Pauli's exclusio principle suggests that maximum capacity of an atomic orbital is two. Auf bau principle suggests that the lower energy orbitals are filled first and hence stability can be attained. Hunds rule of maximum multiplicity suggests that pairing occurs with one electron. The arrangement of electrons in the space around the nucleus can be understood only after writing the electronic configuration. Thus writing electronic configuration is more important in the structure of an atom. Applying Hunds rule of maximum multiplicity, the maximum number of electrons that can posses spin quantum number +1/2 in 4p orbitals is

The cost of one bag is ₹90. What is the rule of ‘m’ bags?

VIKRAM PUBLICATION ( ANDHRA PUBLICATION)-ATOMIC STRUCTURE-VERY SHORT ANSWER QUESTIONS
  1. What is Stark effect ?

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  6. Electrons are emitted with zero velocity from a metal surface when it ...

    Text Solution

    |

  7. State and explain Pauli's exclusion principle.

    Text Solution

    |

  8. What is Aufbau principle ?

    Text Solution

    |

  9. What is Hund's rule ?

    Text Solution

    |

  10. Explain Heisenberg's uncertainty principle .

    Text Solution

    |

  11. What is the wavelength of an electron moving with a velocity of 2.0xx1...

    Text Solution

    |

  12. An atomic orbital has n = 2 , what are the possible valuse of l and m...

    Text Solution

    |

  13. Which of the following orbitals are possible ? (2s,1p,3f,2p)

    Text Solution

    |

  14. The static electric charge on the oil drop is -3.2044xx10^(-19)C . Ho...

    Text Solution

    |

  15. Arrange the following type of radiation in increasing order of frequen...

    Text Solution

    |

  16. How many electrons in an atom may have n=4 and m(s)=+(1)/(2) ?

    Text Solution

    |

  17. How many sub-shells are associated with n = 5 ?

    Text Solution

    |

  18. Explain the particle nature of electromagnetic radiations .

    Text Solution

    |

  19. Explain the significance of Heisenberg's uncertainty principle .

    Text Solution

    |

  20. What series of lines are observed in hydrogen spectra ?

    Text Solution

    |