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Question

Which of the following d-block elements in period 4 has an exceptional electronic configuration?

Options

Choose one · Correct answer highlighted

Explanation

Cr (Z=24) has an exceptional configuration (3d⁵ 4s¹) due to the stability of a half-filled 3d subshell, unlike Sc (3d¹ 4s²), Mn (3d⁵ 4s²), or Fe (3d⁶ 4s²).

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