IGCSE - Chemistry
There are 3 states of matter, solids, liquids and gases. Solids: The particles are packed closely together. The forces between particles are strong enough so that the particles cannot move freely but can only vibrate. As a result, a solid has a stable, definite shape, and a definite volume. Solids can only change
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www.studyguide.pk IGCSE Complete Chemistry Notes
chemistry-igcse1.weebly.comPure substances and impurities A pure substance is a substance that has no particles of any other substance mixed with it. An unwanted substance, mixed with a wanted substance, is called an impurity To check if a substance is pure, you have to check its melting and boiling points.
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