GCSE Exam GCSE Chemistry
                    
                        4.1.2.2 Development of the periodic table
                    
                                    
                
                    
                        4.1.2.3 Metals and non-metals
                    
                                    
                
                    
                        4.1.2.4 Group 0
                    
                                    
                
                    
                        4.1.2.5 Group 1
                    
                                    
                
                    
                        4.1.2.6 Group 7
                    
                                    
                