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What is Hunds Law.

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What is Hunds Law.

    • Posted by Govind Kumar 6 years, 9 months ago

    CBSE > Class 12 > Chemistry
    • 1 answers

    Yogita Ingle 6 years, 9 months ago

    Hund’s rule

    • According to this rule, the electrons are filled in the degenerate orbitals of the same subshell.
    • Electron pairing in p, d and f orbitals cannot be done until each sub-shell is occupied singly.
    • This is because electrons are the same in charge and they repel each other. This repulsion is minimized if two electrons move away from each other by acquiring different degenerate orbitals.
    • All the orbitals which are singly occupied have parallel spins which can be either clockwise or anticlockwise.
    • If the electrons have parallel spin then there will be less inter-electronic repulsions and high spin multiplicity.
    • So in order to maximize spin multiplicity, the pairing of electrons in a sub-shell does not take place until each sub-shell is singly occupied.

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