Chemistry
Grade-9
Easy
Question
The chemical formula for an ionic compound of potassium and oxygen is:
- KO
- K2O
- K2O2
- 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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