Key term for OCR GCSE Chemistry A, used in Properties of materials.
Airborne particles, often referred to as dust, with diameters between 2,500 nm and 10,000 nm (2.5 × 10⁻⁶ m to 1 × 10⁻⁵ m).
Coarse particles (PM₁₀) appears in OCR GCSE Chemistry A revision content for Elements, compounds and mixtures, especially Properties of materials and Nanoscale Dimensions.
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