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States of matter
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The particle model of solids, liquids, and gases

The particle model of solids, liquids, and gases

Particle models of solid, liquid, and gas showing arrangement, movement, and relative energy

Kinetic particle theory says that all matter is made of tiny particles that are always moving. The state of matter depends on how those particles are arranged, how they move, and how much energy they have.

States of matter Lesson

  1. GCSE
  2. /Chemistry
  3. /States of matter

Step-by-step lessons covering Edexcel GCSE Chemistry States of matter 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.