Question

Write the chemical formulae of the following compounds.

1. Sulphur dioxide
2. Calcium oxide

Answer 1

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

For example – Water, sugar, and table salt.

Chemical formula - The short representation of a compound using elemental symbols is called a chemical formula of that compound.

The chemical formula shows the different types of elements involved and the number of atoms in the compound.

COMPOUND	CHEMICAL FORMULA
Sulphur dioxide	SO2
Calcium oxide	CaO