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3.1 States of matter
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Particle model of matter

Particle model of matter

Particle arrangements in a solid, liquid, and gas

Every substance is made of particles that are always moving. In a solid, particles are very close together in a regular arrangement and vibrate about fixed positions.

3.1 States of matter Lesson

  1. GCSE
  2. /Chemistry
  3. /3.1 States of matter

Step-by-step lessons on Edexcel GCSE Chemistry 3.1 States of matter, covering 3.1.1 The three states of matter and changes of state. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.

Lessons