Define pure substances.
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A chemical substance is a form of matter having constant chemical composition and characteristic properties. Some references add that chemical substance cannot be separated into its constituent elements by physical separation methods, i.e., without breaking chemical bonds.
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a pure substance is defined as something that is composed of only one type of particle.
This means that pure substances are either elements or compounds.
Everything else is a mixture.
Examples of Pure Substances
Hydrogen gas.
Gold metal.
Sugar (sucrose)
Baking soda (sodium bicarbonate)
Ammonia.
Diamond.
Copper wire.
Silicon chip.
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