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.
(N/A) $(i)$ Vanadate,$VO_3^-$. The oxidation state of $V$ is $+5$,which equals its group number $(5)$.
(ii) Chromate,$CrO_4^{2-}$. The oxidation state of $Cr$ is $+6$,which equals its group number $(6)$.
(iii) Permanganate,$MnO_4^-$. The oxidation state of $Mn$ is $+7$,which equals its group number $(7)$.
(ii) Chromate,$CrO_4^{2-}$. The oxidation state of $Cr$ is $+6$,which equals its group number $(6)$.
(iii) Permanganate,$MnO_4^-$. The oxidation state of $Mn$ is $+7$,which equals its group number $(7)$.
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