The electronic configurations of {}_{24}Cr an | vedclass

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(A) The electronic configuration of ${}_{24}Cr$ is $[Ar] 3d^5 4s^1$ and that of ${}_{29}Cu$ is $[Ar] 3d^{10} 4s^1$. These configurations are considere

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Half-filled and fully-filled subshells are more stable

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(A) The electronic configuration of ${}_{24}Cr$ is $[Ar] 3d^5 4s^1$ and that of ${}_{29}Cu$ is $[Ar] 3d^{10} 4s^1$. These configurations are considered abnormal because they deviate from the expected filling order of the Aufbau principle. The stability of these configurations arises because half-filled $(d^5)$ and fully-filled $(d^{10})$ subshells possess extra stability due to symmetry and exchange energy. While they are indeed $d-$block elements,the primary reason for the specific electronic arrangement is the stability of the filled/half-filled subshells.

The electronic configurations of ${}_{24}Cr$ and ${}_{29}Cu$ are abnormal because $:-$

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