Fe(II) ions have how many d electrons?
Question
Fe(II) ions have how many d electrons?
Solution
Fe(II) ions have 6 d electrons. The atomic number of iron (Fe) is 26, which means it has 26 electrons in its neutral state. The electron configuration of a neutral iron atom is [Ar] 3d6 4s2. When it loses 2 electrons to become Fe(II), it loses the 2 electrons from the 4s orbital, leaving it with 6 electrons in the 3d orbital.
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