The electron configuration of a Cr³⁺ ion is A) [Ar]3d⁵. B) [Ar]4s¹3d². C) [Ar]3d³. D) [Ar]4s¹3d⁵. E) [Ar]4s²3d⁴.

Name: The electron configuration of a Cr 3+ ion is A) [Ar]3d 5 . B) [Ar]4s 1 3d 2 . C) [Ar]3d 3 . D) [Ar]4s 1 3d 5 . E) [Ar]4s 2 3d 4 .
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The correct electron configuration for a Cr^3+ ion is [Ar]3d^3. When Cr loses three electrons to form Cr^3+, it loses the two 4s electrons first and then one from the 3d orbital, resulting in [Ar]3d^3.

The Electron Configuration of a Cr3+ Ion Is

The Electron Configuration of a Cr³⁺ Ion Is