GCSE CHEMISTRY - The Best Free Revision for GCSE Science.
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APPLIED SCIENCE UNIT 14
Section 1.4 CHEMICAL CHANGES - REACTIONS - reactants and products Heating iron and sulphur is classic chemistry experiment to illustrate what is meant by CHEMICAL CHANGE and you can adapt the general conclusions described at the end of this section to any chemical reaction. A mixture of silvery grey iron filings and yellow sulphur powder is made. The iron can be plucked out with a magnet i.e. an easily achieved physical separation because the iron and sulphur are not chemically combined yet! They are still the same iron and sulphur. However, on heating the mixture, it eventually glows red on its own and a dark grey solid called iron sulphide is formed. gcse definitions Atom element molecule compounds pure impure mixture, meaning definitions physical change, evidence of chemical change explained explaining KS3 science KS4 science GCSE IGCSE O Level chemistry revision notes
DOC BROWN'S CHEMISTRY REVISION WEBSITE revision notes for GCSE/IGCSE/O level students A NEW more concise button index below, the original detailed index has been left further down the page! Also note the help pages AQA GCSE SCIENCES * EDEXCEL GCSE SCIENCES OCR GCSE 21st CENTURY SCIENCES * OCR GCSE GATEWAY SCIENCES IGCSE/GCSE CHEMISTRY study REVISION NOTES student exam revising help doc brown iphone ipad notepad notebook netbook epad tablet android
GCSE CHEMISTRY - The Best Free Revision for GCSE Science. Atomic Structure and Bonding Carbon, Nitrogen and Water Cycles Catalysts and Energy Crude Oil and its Products Elements, Compounds and Mixtures
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