limitation of Afbau principle
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Limitation of aufbau principle:
The Aufbau principle cannot be applied to predict electron configuration of atoms on ionization. Although (n-1) d subshells and ns subshells lie fairly close together, yet the former is slightly higher in energy. In the 6th period, 4f and 5d subshells are exceptionally close in energy.
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Explanation:The Aufbau principle cannot be applied to predict electron configuration of atoms on ionization. Although (n-1) d subshells and ns subshells lie fairly close together, yet the former is slightly higher in energy. In the 6th period, 4f and 5d subshells are exceptionally close in energy.
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