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Differentiating electron in K(19) goes i...

Differentiating electron in K(19) goes into ns and this is s-block element. What happens if Aufbau rule is not followed?

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K(19) in the absence of Aufbau rule will have electronic configuration as `1s^(2) 2s^(2) 2p^(6) 3s^(2) 3p^(6) 3d^(1)` and thus differentiating electron enters into 3d-d block element.
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