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An element is a pure substance of one type of atom.

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

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Elements that are chemically combined with other elements of a different type.

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

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Two or more non-chemically combined pure substances.

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