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    GCSE Exam GCSE Physics
                    
                        4.4.2.1 Radioactive decay and nuclear radiation
                    
                                    
                
                    
                        4.4.2.2 Nuclear equations
                    
                                    
                
                    
                        4.4.2.3 Half-lives and the random nature of radioactive decay
                    
                                    
                
                    
                        4.4.2.4 Radioactive contamination
                    
                                    
                