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Unit 9 · Matter

Physical and Chemical Change

ScienceSubject

16 minEstimated read

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Unit 9 topics

Matter and Density Relative Density, Floating and Sinking Elements and Atoms Molecules and Compounds Physical and Chemical Change

Quick Facts

Unit: 9: Matter
Topic: Physical and Chemical Change
Domain: Chemistry

Twelve characteristics, one sentence

Study Tip

Do not memorise the twelve characteristics. Learn one sentence instead: a physical change rearranges the molecules, and a chemical change rearranges the atoms inside them. Then in the examination hall ask two questions of any change: is there a new substance, and can you get the old one back?