Key Stage 3
Meaning
A pure substance is one that contains only one type of chemical.
About Pure Substances
- The opposite of a pure substance would be a mixture of substances.
- A substance can be pure because it is made of only one element or it can be pure because it is made of only one compound.
Examples
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| Pure Gold is a solid made of only Gold atoms. | Pure Mercury is a Liquid made of only Mercury atoms. | Pure Oxygen is a gas made of only Oxygen atoms. |
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| Pure Magnesium Oxide is a solid made of only the compound Magnesium Oxide | Pure water is a liquid made of only the compound H2O. | Pure Carbon Dioxide is a gas made of only Carbon Dioxide molecules. |