Question

Is air a pure substance?

Answer 1

no; it is a mixture

Explanation:

air is a mixture of different elements and compounds.

elements include

• nitrogen (~78%)
• oxygen (~21%)
• argon (~1%)

compounds include

• carbon dioxide (~0.04%)

compounds are made up of different atoms chemically combined together.

elements are entirely made up of atoms of the same type.

there are many different gases in air, and these gases are not chemically combined. instead, they are a mixture of different gases.