Specification Point 1.8:
Understand how to classify a substance as an element, compound or mixture
|Element||A substance made up of atoms that all contain the same number of protons (one type of atom) and cannot be split into anything simpler. There are limited types of element. |
Example: Hydrogen, Oxygen, Carbon
|Compound||A pure substance made up of two or more elements chemically combined together. There are unlimited types of compound. Cannot be separated by physical methods of separation. |
Example: Copper (ii) Sulphate, Calcium Carbonate
|Mixture||A combination of two or more substances (elements and/or compounds) that are not chemically joined together. Can be separated by physical methods of separation. |
Example: Sand and water, oil and water
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Jamie got a First class degree in Chemistry from Oxford University before going on to teach chemistry full time as a professional tutor. He’s put together these handy revision notes to match the Edexcel IGCSE Chemistry specification so you can learn exactly what you need to know for your exams.
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