What are the classifications of matter?

Matter is a substance that has a mass and occupies a space.
Matter is classified into:

1- Element: contains one type of atoms. Examples: Hydrogen gas, copper element.

2- Compound: made from atoms of different elements bonded together chemically with fixed ratios

chemical and physical properties of compound different from parent elements. Example: Sodium chloride.

3- Mixture: contains more than one compound or element mixed physically without chemical bond with any ratios. Example: Sea water, air and brass alloy.

  

Element	Compound	Mixture
One or more atoms	Two or more atoms	Two or more compounds or elements joined together physically (mixing only)
Same type of atoms	Different type of atoms	Different type of atoms
Iron (Fe) Copper (Cu)  Hydrogen gas H2	Water (H2O)    Carbon dioxide (CO2) Table salt (NaCl)	Sea water   Air (air is a mixture of different gases like oxygen, hydrogen and nitrogen