{}_{24}Cr has configuration 3d^5,4s^1 instead | vedclass

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(C) The electronic configuration of ${}_{24}Cr$ is $[Ar] 3d^5 4s^1$.This configuration is more stable than $[Ar] 3d^4 4s^2$ due to two main reasons:$1

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$A$ and $B$ both

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(C) The electronic configuration of ${}_{24}Cr$ is $[Ar] 3d^5 4s^1$.This configuration is more stable than $[Ar] 3d^4 4s^2$ due to two main reasons:$1$. Higher exchange energy: The $3d^5$ configuration allows for a greater number of possible exchanges between electrons with parallel spins,which releases more energy and increases stability.$2$. Symmetrical distribution of electron: The half-filled $d$-subshell $(d^5)$ provides a symmetrical distribution of electron density,which leads to lower electron-electron repulsion and higher stability.

${}_{24}Cr$ has configuration $3d^5\,4s^1$ instead of $3d^4\,4s^2$ because of

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