In The Ground-State Electron Configuration Of Fe3+, How Many Unpaired Electrons Are Present?

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In The Ground-State Electron Configuration Of Fe3+, How Many Unpaired Electrons Are Present?

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Iron as an atom has 4 electrons that are unpaired: 3D (II) (I ) (I) (I )(I ), 4S(II) But it loses the 2 electrons in the 4th S & 1 electron in the 3D to become Fe+3: 3D (I ) (I ) (I) (I )(I ), 4S( ) therefor all of the 3rd shell D- orbitals are unpaired

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