chemistry 3.0 / 5 based on 1 rating ? ScienceChemistryGCSEAQA Created by: DymphnaCreated on: 16-04-13 21:16 what is the structure of an atom? a small nucleus surrounded by electrons. 1 of 37 what is an element? a substance made up of only one type of atom. 2 of 37 approx. how many elements are there? 100 3 of 37 where can you find the elements? periodic table. 4 of 37 how are elements grouped? by their properties. 5 of 37 what is a compund? a substance sontaining more than one element. 6 of 37 what are the environmental effects of quarrying limestone? dust, noise, loss of wildlife habbitats 7 of 37 what are the social effects of quarrying limestone? traffic, improved roads 8 of 37 what are the economic effects of quarrying limestone? employment, trade for business 9 of 37 how is limestone used to make cement? limestone mixed with clay and heated in kiln. ground to fine powder 10 of 37 how is limestone used to make concrete? add aggregate to cement, sand and water. 11 of 37 how is limestone used to make glass? limestone heated with sand and soda(sodium carbonate) 12 of 37 what is calcium carbonate commonly known as? limestone 13 of 37 what is thermal decomposition of calcium carbonate? when heated it decomposes to make calcium oxide and carbon dioxide. 14 of 37 what is quicklime? calcium oxide 15 of 37 what is slaked lime? calcium hydroxide. 16 of 37 how is the lime kiln used? reduces calcium carbonate to lime. 17 of 37 what are alloys? mixtures of metals. 18 of 37 what are ores? rock which contains enough metal to be extracted from. 19 of 37 what unreactive metals are found in earth as metal? gold. 20 of 37 how is the blast furnace used to make iron? iron is reduced at high temperatures in a blast furnace using carbon. 21 of 37 what are the properties of pure iron? soft 22 of 37 how is steel made? it is added to iron and carbon. 23 of 37 where on the periodic table are the transition metals? middle. 24 of 37 what process is used to extract copper? smelting 25 of 37 what properties do titanium and aluminium have? low density, resistant to corrosion, 26 of 37 what is used to extract aluminium? molten aluminium oxide. 27 of 37 why is extracting aluminium expensive? requires high temperature and electricity 28 of 37 what are hydrocarbons? compound containing hydrogen and carbon. 29 of 37 what is crude oil? a mixture of many different compunds which can be separated by heating. 30 of 37 how does fractional distillation work? compounds evapourating at different temperatures. 31 of 37 what is an alkane? saturated hydrocarbon. 32 of 37 what is the general formula for an alkane? cnh2n+2 33 of 37 what is an alkene? unsaturated hydrocarbon 34 of 37 what is the general formula for an alkene? cnh2n 35 of 37 what 3 gases can be released when a fuel burns? carbon monoxide, sulfur dioxide, nitrogen oxide 36 of 37 how is acid rain made? carbon dioxide in the air dissolves in rain water. 37 of 37
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