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Write electronic configurations of Fe, Fe^(2+), Fe^(3+)

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Write electronic configurations of Fe, Fe2+, Fe3+

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Species Orbital notation
Fe 1s2 2s2 2p6 3s2 3p6 4s2 3d6 OR
[Ar] 4s2 3d6
Fe2+ Is2 2s2 2p6 3s2 3p6 3d6 OR
[Ar] 3d6
Fe3+ 1s2 2s2 2p6 3s2 3p6 3d5 OR
[Ar] 3d5
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