Which of the following is violating Hund's ru | vedclass

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(D) Hund's rule of maximum multiplicity states that for a given electron configuration,the lowest energy term is the one with the greatest value of sp

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All of the above

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(D) Hund's rule of maximum multiplicity states that for a given electron configuration,the lowest energy term is the one with the greatest value of spin multiplicity. This means that electrons must occupy all available degenerate orbitals singly with parallel spins before pairing begins.In option $A$,the $2p^4$ configuration is shown as $(\uparrow)(\uparrow\downarrow)(\uparrow)$. This is a valid configuration as it follows the rule of filling orbitals singly before pairing.In option $B$,the $2p^2$ configuration is shown as $(\uparrow\downarrow)(	ext{empty})(	ext{empty})$. This violates Hund's rule because the electrons should have occupied separate orbitals with parallel spins $(\uparrow)(\uparrow)(	ext{empty})$ instead of pairing in the first orbital.In option $C$,the $2p^3$ configuration is shown as $(\uparrow)(\downarrow)(\uparrow)$. This violates Hund's rule because the electrons should have parallel spins $(\uparrow)(\uparrow)(\uparrow)$ when occupying degenerate orbitals singly.Since both $B$ and $C$ violate Hund's rule,the correct answer is $D$.

Which of the following is violating Hund's rule?

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