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UHS MDCAT 2023 Chemistry UHS MDCAT 2023 Past Paper #Atomic Structure #Electronic Configuration

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Which of the following is correct electronic configuration of iron (II) ion (atomic no. of Fe is =26)? (UHS MDCAT 2023)

Verified Answer & Explanation⌄

Correct Answer: A) [Ar] 4s⁰, 3d⁶

Concept Explanation

Fe is [Ar]3d⁶4s²; forming Fe²⁺ removes the two 4s electrons first, giving [Ar]3d⁶.

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