AQA Chemistry Core Key Points of the AQA Chemisrty Corse 1.5 / 5 based on 2 ratings ? ChemistryGCSEAll boards Created by: Abi GrahamCreated on: 25-01-12 16:45 Rocks and building all substances are made of atoms elements are substances made of only one type of atom symbols are used to show what happends in chamical reactions limestone is used as a building material and to make quicklime, cement and glass thermal decompostion of limestone makes quicklime and carbon dioxide the formula of a substance shows the number of atoms of each element that have joined together cabonates of metals decompse when heated to produce the metal oxide and carbon doxide we can represent chemical reactions bybalanced equations in a chemical reaction the mass of the reactants is eual to the mass of the products adding water to quiklime prduces slaked lime lime water is used aas a test for carbon dioxide mortor can be made by mixing slaked lime, sand and water cement is made by heating a mixyure of limestone and clay concrete is made by mixing cement with sand, stones or crushed rock and water glass can be made from limestone, sand and sodium carbonate 1 of 2 Rocks and metals an ore contains enough metal to mskr it worth extracting the metal 2 of 2
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