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Chapter 1.2 Elements, compounds and mixtures - Summary Pearson Edexcel International GCSE (9-1) Chemistry Student Book - Chemistry

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Summary of 4 pages for the course Chemistry at GCSE (.)

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1 - 2 Elements, compounds and mixtures


Elements, compounds and mixtures




● ***Element: pure substance ONLY consisting of atoms which all have same atomic
number in their nuclei
● ***Compound: ANY substance composed of identical molecules/formula
units consisting of atoms of ≥2 chemical elements
● ***Mixture: ANY material made up of ≥2 DIFFERENT chemical substances
which are NOT CHEMICALLY COMBINED

● ***Pure substance has fixed melting & boiling point
● ***Mixture may melt/boil over a range of temperatures




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