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Anomaly electron configuration

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Anomaly electron configuration refers to exceptions to the standard Aufbau principle and Hund's rule for filling electron orbitals. These anomalies occur due to the relative stability of half-filled or fully-filled subshells, leading to a shift in electron placement in certain elements. For example, Chromium (Cr) and Copper (Cu) have unusual configurations due to the stability of having a half-filled 3d subshell and a fully-filled 3d subshell, respectively.

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