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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