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What is a pure substance?

What is a pure substance?

Particle diagrams showing a pure element, a pure compound, and a mixture

In chemistry, a pure substance contains only one element or only one compound, with nothing else mixed into it. A pure element contains atoms with the same number of protons.

8.1.1 Pure substances Lesson

  1. GCSE
  2. /Chemistry
  3. /8.1.1 Pure substances

Step-by-step lessons covering AQA GCSE Chemistry 8.1.1 Pure substances for Foundation and Higher tier. Each lesson works through exam-style questions in Paper 1 and Paper 2 format. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons