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.
(i) Vanadate (VO3-)-Oxidation state of V is + 5.
(ii) Chromate (CrO4 2-)-Oxidation state of Cr is + 6.
(iii) Permanganate (MnO4 -) Oxidation state of Mn is + 7.