Question

Example of an ionic compound is :

• A. water
• B. ammonia
• C. carbon dioxide
• D. calcium oxide

Answer 1

The correct option is D calcium oxide

The ionic compound is formed when metals react or bond with non-metals. They are held next to each other by electrical attraction. Typically, ionic compounds are solids, which always appear as crystals, and they have high melting and boiling points. They also conduct electrical current well when in a molten or aqueous state.

Calcium oxide is an ionic compound. Calcium has 2 electrons in its valence shell and oxygen has 6 electrons. Therefore, two electrons are transferred from calcium to oxygen to become stable configuration.