AP Chemistry
1.8 Valence Electrons and Ionic Compounds
1.7 Periodic Trends
1.5 Atomic Structure and Electron Configuration
The ground-state electron configuration of a neutral iron atom, \(\text{Fe}\), is \([\text{Ar}]\,4s^2 3d^6\). Which of the following identifies the correct ground-state electron configuration of the \(\text{Fe}^{2+}\) ion and provides the correct justification for the order of electron removal?
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