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8.6     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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Following oxometal anions of the first series that exhibits the oxidation state equal to its group number- 

  1. Vanadate (VO_{3}^{-})
    Group number of vanadium(V) is 5 and here the oxidation state is also +5
  2. Chromate ion (CrO_{4}^{2-})
    Group number of chromium is (VIB) and the oxidation state is +6
  3. Permanganate ion (MnO_{4}^{-})
    Group number of (Mn) is VIIB and here the oxidation number is also +7
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