The relative energies between 3 d and 4 s levels Since in ground state of potassium atom the outer most electron is in 4 s state rather than 3 d state.

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Chapter 41, Problem 41.11DQ

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The relative energies between 3d and 4s levels Since in ground state of potassium atom the outer most electron is in 4s state rather than 3d state.

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