We space being inquiry how countless electrons are unpairedin the ground-state electron configuration of Fe3+ ion. To figure that out, let’s very first write the electron configuration of a neutral (uncharged) Fe atom.

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Ground-state way that stole is in its shortest energy kind (not in one excited state).

Neutral element: atom number = # proton = # that electrons


Neutral iron (Fe):

• atomic number = 26• # of electron = 26 e-


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