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GCSE Combined Science · key term
A single element or a single compound, not mixed with any other substance.
Used by AQA and Edexcel
Specification 5.8.1.1, 5.8.1.3 · Paper 4
Revise: Pure SubstancesIn chemistry, a pure substance is a single element or a single compound, not mixed with any other substance. Purity describes the chemical contents of a sample, rather than how clean, natural or safe it seems.
A single element or compound that is not mixed with any other substance.
Specification Methods of separating and purifying substances · Paper 3, Paper 4
A single element or compound that is not mixed with any other substance.
Revise: Purity and choosing separation methodsIn chemistry, a pure substance is a single element or compound, with no other substances mixed into it.
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