Which of the following electronic configurations represents Fe 3+ ?

Chemistry · JEE Main · NTA Exams — d- and f-Block Elements

1. [Ar]3d⁶4s²
2. [Ar]3d⁵4s¹
3. [Ar]3d⁵4s²
4. [Ar]3d⁵4s⁰

Answer

(D) [Ar]3d 5 4s 0

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