Identify the constituent elements in the following compounds: Calcium oxide, Ammonia, Nitric acid, Calcium carbonate, Copper sulfate.

Element - It is a pure substance made up of atoms of the same kind and cannot be separated by any chemical method.

Compound - It is a pure substance made by a chemical reaction of two or more different elements in a fixed proportion.

For example - Water, Common salt, and Sugar.

COMPOUNDS	MOLECULAR FORMULA	ELEMENTS
Calcium oxide	CaO	Calcium and Oxygen
Ammonia	NH3	Nitrogen and Hydrogen
Nitric acid	HNO3	Hydrogen, Nitrogen, and Oxygen
Calcium carbonate	CaCO3	Calcium, Carbon, and Oxygen
Copper sulfate.	CuSO4	Copper, Sulfur, and Oxygen