Why is the common oxidation state of the aqueous ions of Fe, Mn, and Zn +2?

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I know they are all transition metals, but I'm not completely sure how it determines oxidation state.

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Answer 1 · 2017-01-06T16:18:36

Well, these metals commonly (but not exclusively) form bivalent ions, #M^(2+)#.......

#Fe^(2+), Mn^(2+)#, and #Zn^(2+)# are common aqueous ions.........