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    GCSE Exam GCSE Chemistry
                    
                        4.4.1.1 Metal oxides
                    
                                    
                
                    
                        4.4.1.2 The reactivity series
                    
                                    
                
                    
                        4.4.1.3 Extraction of metals and reduction
                    
                                    
                
                    
                        4.4.1.4 Oxidation and reduction in terms of electrons (HT only)