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Which of These Choices Is the Electron Configuration of the Iron(III)

Question 2

Multiple Choice

Which of these choices is the electron configuration of the iron(III) ion?

A) [Ar]3d⁵
B) [Ar]4s¹3d⁵
C) [Ar]4s²3d³
D) [Ar]3d⁶
E) [Ar]4s²3d⁹

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