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

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What is the proton (atomic number) of an element that has four unpaired electrons in its ground state? (UHS MDCAT 2023)

Verified Answer & Explanation⌄

Correct Answer: D) 26

Concept Explanation

Fe (Z = 26) has ground-state configuration [Ar]3d⁶4s²; a d⁶ arrangement contains four unpaired electrons.

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