: Particles are closely packed in a regular, fixed pattern (often called a lattice).
(e.g., Grade 10, Grade 12, first year university)
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: Because particles are already touching, solids cannot be easily compressed, a feature often compared to gases in exam questions. Common Exam Question Types 5. Solids, Liquids & Gases | Edexcel IGCSE Physics Phase 2: The Untimed Open-Book Run Build your
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: Strong intermolecular forces hold the particles together, which explains why solids have a definite shape and definite volume .