Question

A chemical substance may occur as an element, mixture or compound. To which category does air belong? ___________________________

Answer 1

Answer:

mixture is the answer .but not sure...or element..

Answer 2

Answer:

Air is a mixture.

• Element – It is a one single atom, it cannot be divided further.

Example: Calcium, phophorous

• Compound – ‘two or more different atoms’ chemically bonded together.

Example:  water, ammonia

• Molecule - two or more different or same atoms ‘chemically bonded together’.

Example: Methane

• Mixture – Contains more than ‘one compound or elements’

Example: Chocolate milk, salt water.

‘Air is a mixture’ because it composed of several elements, gases and compounds.