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    Chemistry
    Grade-9
    Easy

    Question

    The chemical formula for an ionic compound of potassium and oxygen is:

    1. KO
    2. K2O
    3. K2O2
    4. KO2

    Hint:

    Potassium has +1 oxidation state and oxygen has -2 charge.

    The correct answer is: K2O

      • Generally compounds are neutral, charges are balanced out.
      • Potassium has +1 oxidation state and oxygen has -2 charge.
      • To balance out the charges two potassium and one oxygen is required.
      • The chemical formula is K2O.

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