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Write the electronic configuration of Fe...

Write the electronic configuration of `Fe^(2+)`.

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`"" _(26)Fe^(2+) - 1s^(2) 2s^(2) 2p^(6)3s^(2)3p^(2) 3d^(2) 4s^(2)`
`""_(26)Fe^(2+)- 1s^(2) 2s^(2)2p^(6)3s^(2) 3p^(6)3d^(6) = [ Ar] 3d^(6)`
Thus , the configuration of `Fe^(2+)` is [Ar] `3d^(6)`
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