C1.2.4 understand that a substance chemically combining with oxygen is C4.5.2  an example of oxidation, that loss of explain reduction and oxidation in terms oxygen is an example of reduction, and of loss or gain of oxygen, identifying that combustion reactions therefore which species are oxidised and which involve oxidation are reduced C1.2.5 understand that fuels burn more rapidly N/A  in pure oxygen than in air C1.2.6 recall that oxygen can be obtained NA from the atmosphere and can be used  to support combustion (e.g. in oxy-fuel welding torches) C1.2.7 use the names and symbols of the first 20 elements, Groups 1, 7 and 0 and other common elements from a supplied Periodic Table to write formulae and balanced  chemical equations where appropriate use the names and symbols of common elements and compounds and the principle of conservation of mass to write formulae understand that in a chemical reaction and balanced chemical equations and the properties of the reactants and ionic products are different equations
C1.2.4 understand that a substance chemically combining with oxygen is an example of oxidation, that loss of oxygen is an example of reduction, and that combustion reactions therefore involve oxidation C4.5.2 explain reduction and oxidation in terms of loss or gain of oxygen, identifying which species are oxidised and which are reduced  C1.2.5 understand that fuels burn more rapidly in pure oxygen than in air N/A  C1.2.6 recall that oxygen can be obtained from the atmosphere and can be used to support combustion (e.g. in oxy-fuel welding torches) NA  C1.2.7 understand that in a chemical reaction the properties of the reactants and products are different use the names and symbols of the first 20 elements, Groups 1, 7 and 0 and other common elements from a supplied Periodic Table to write formulae and balanced chemical equations where appropriate use the names and symbols of common elements and compounds and the principle of conservation of mass to write formulae and balanced chemical equations and ionic equations 
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