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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