1(b) Elements, Compounds and Mixtures

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1.8 understand how to classify a substance as an element, compound or mixture
1.9 understand that a pure substance has a fixed melting and boiling point, but that a mixture may melt or boil over a range of temperatures
1.10 describe these experimental techniques for the separation of mixtures:

1.11 understand how a chromatogram provides information about the composition of a mixture
1.12 understand how to use the calculation of Rf values to identify the components of a mixture
1.13 know how to carry out paper chromatography using inks/food colourings