Elements Compounds and Mixtures

Element- A pure substance, it’s not a mixture.

Mixtures are made with two or more substances that are not chemically combined.

Compounds are made with two or more substances that are chemically combined

Separating Mixtures

Filtration- Separate an insoluble solid from a liquid.

Evaporation- Separates soluble solids from it’s solution (liquid) to make crystals.

Simple Distillation-Separates liquid from a solution with different boiling temperatures. (e.g salt and water)

Fractional Distillation- Separates liquid with different boiling points.

Paper Chromatography- Chromatography can be used to separate mixtures of coloured compounds. (e.g inks).

	Chemical Change	Physical Change
Easy to reverse?	Irreversible	Reversible
Substances	New substances are formed	No new substances
Energy Change?	Either exothermic or endothermic	No
Colour Change?	can result in change of colour	No
Change of state?	can have a change of state	Usaully change of sate