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Which Ground-State Electron Configuration Is Incorrect

Question 23

Multiple Choice

Which ground-state electron configuration is incorrect?

A) Br:[Ar]3d¹⁰4s²4p⁵
B) K:[Ar]4s¹
C) Fe:[Ar]3d⁵
D) Na:1s²2s²2p⁶3s¹
E) Zn:[Ar]3d¹⁰4s²

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