Problem: Which of the following atoms is listed with an INCORRECT electron configuration? A. Br - [Ar]4s2 3d10 4p5 B. Pb - [Xe]6s2 5d10 4f14 6p2 C. Mo - [Kr]5s2 4d4 D. Y – [Kr]5s2 4d1 E. Fe - [Ar]4s2 3d6

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Problem Details

Which of the following atoms is listed with an INCORRECT electron configuration?

A. Br - [Ar]4s2 3d10 4p5

B. Pb - [Xe]6s2 5d10 4f14 6p2

C. Mo - [Kr]5s2 4d4

D. Y – [Kr]5s2 4d1

E. Fe - [Ar]4s2 3d6

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