Which one of the following species has the electron configuration [Ar]3d⁴? A) Fe³⁺ B) Mn²⁺ C) V³⁺ D) Cr²⁺ E) K⁺

Name: Which one of the following species has the electron configuration [Ar]3d 4 ? A) Fe 3 + B) Mn 2 + C) V 3 + D) Cr 2 + E) K +
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The electron configuration given can be simplified as [Ar]3d5 4s1. This matches the electron configuration of Cr, as it has 5 electron in the d-orbital and 1 in the s-orbital. None of the other options match this configuration.

Which One of the Following Species Has the Electron Configuration