Which polyatomic ion contains the greatest number of oxygen atoms?

Which polyatomic ion contains the greatest number of oxygen atoms?

1. Acetate

2. Carbonate

3. Hydroxide

4. Peroxide

3 Answers

  • Just look at their formulas.

    Acetate has two oxygen atoms

    Carbonate has three

    Hydroxide has one

    Peroxide has two.

    Therefore, Carbonate has the most oxygen atoms.

  • 1) Acetate/Etanoate – CH3COO- 2 oxygen atoms

    2) Carbonate – CO3 2- 3 carbon atoms

    3) Hydroxide – OH- 1 carbon atom

    4) Peroxide – O2 2- 2 carbon atoms

    Carbonate – CO3 2- has the most oxygen atoms

    so 2) is your answer

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