Name the oxometal anions of the first series of the transition metals in which the metal exhibits the oxidation state equal to its group number.
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Solution 1
Cr2072- and Cr042- (Group number = Oxidation state of Cr = 6).
Mn04– (Group number = Oxidation state of Mn = 7).
Solution 2
Vanadate, `VO_3^(-)`
Oxidation state of V is + 5.
Chromate, `CrO_4^(2-)`
Oxidation state of Cr is + 6.
Permanganate, `MnO_4^(-)`
Oxidation state of Mn is + 7.
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