Question

$\huge{\mathfrak{\red{Question:-}}}$

Why some species violate aufbau's principle. Explain in detail
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Answer 1

When the difference in energy levels between two subshells is small, an electron may transfer to the higher level shell to fill or half-fill it. The electron occupies the higher energy level shell in violation of the Aufbau principle because the atom is more stable that way.

Answer 2

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