Chemical energy is released when bonds blank in a chemical reaction

Which diagram shows the correct way to represent an ionic compound of magnesium oxide?

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together

What information does a complete ionic equation give that the balanced equation doesn’t show?