Evaluate the observed electronic configurations of Chromium () and Copper (). Which theoretical factor predominantly drives their deviation from the expected Aufbau filling order?

Question

Evaluate the observed electronic configurations of Chromium ($Cr$) and Copper ($Cu$). Which theoretical factor predominantly drives their deviation from the expected Aufbau filling order?

Prashant Kotian · Accepted Answer

Correct answer: D. Very little energy difference exists between the and orbitals. An electron shifts to maximize exchange energy and achieve a symmetrical, highly stable (Chromium) or (Copper) configuration.

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