Which is an example of an ionic compound?

Copper (II) sulfate forms blue crystals, and the crystals are hard but brittle.

Carbon dioxide is a gas at room temperature and is formed from carbon and oxygen atoms.

Copper has a metallic color and can be hammered into different shapes.
A B or C?

Question

Which is an example of an ionic compound? 



Copper (II) sulfate forms blue crystals, and the crystals are hard but brittle. 



Carbon dioxide is a gas at room temperature and is formed from carbon and oxygen atoms. 



Copper has a metallic color and can be hammered into different shapes. 
A B or C?

eclipsedstar · Answer

Can you please stop posting Chemistry questions on the English section? It is spam if the user continuously does so while knowing that it is not allowed.