• Elements cannot be broken down through chemical reactions.

• Elements are found on the periodic table.

• Elements only contain one of the same type of atom.

• Elements all have atomic numbers.

Examples:

• Iron

• Gold

• Carbon

• Uranium

• Lead

• Most substances are compounds.

• They are made of different, chemically combined elements.

• Has properties unrelated to the base elements properties.

• All compounds of the same type have a fixed chemical composition.

Examples:

• Salt

• Sugar

• Water

• Carbon Dioxide

• Carbon Monoxide

• Each element or pure substance in a mixture retains its properties.

• Variable composition.

• They can either be heterogeneous or homogeneous.

• They can be separated through physical means.

Examples:

• Salt Water

• Sugar Water

• Steel

• Air

• Wine