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Element M Has the Valence Electron Configuration 3d⁶ 4s²

Question 137

Multiple Choice

Element M has the valence electron configuration 3d⁶ 4s².What is the valence electron configuration of The M³⁺ ion?

A) 3d⁵
B) 3d³ 4s²
C) 3d⁴ 4s¹
D) 3d⁹ 4s²

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