Which complex ion possesses the largest number of unpaired electrons? A) CoCl₄^2- B) Cr(NH₃)₆²⁺ C) Cu(NH₃)₄²⁺ D) Mn(CN)₆^4- E) Fe(H₂O)₆³⁺

Name: Which complex ion possesses the largest number of unpaired electrons? A) CoCl 4 2- B) Cr(NH 3 ) 6 2+ C) Cu(NH 3 ) 4 2+ D) Mn(CN) 6 4- E) Fe(H 2 O) 6 3+
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Question

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Fe(H₂O)₆³⁺ has 5 unpaired electrons because Fe³⁺ has a d⁵ configuration, and water is a weak field ligand, so it does not pair the electrons.

Which Complex Ion Possesses the Largest Number of Unpaired Electrons