Page 2 - classification of elements
P. 2

AN ATOM CONSISTS OF CENTRALLY DENSE REGION



  CALLED NUCLEUS CONSISTS OF PROTON AND




  NEUTRON AND ELECTRONS REVOLVE




    AROUND THE NUCLEUS IN FIXED PATH CALLED





  ORBIT/SHELL.






    S.N                            Particles                     Charge                           Mass amu                       Relative                       Position


                                                                                                                                 mass



    1.                             Electron                      - ve                             0.000544                           1      amu                 In shells


                                                                                                                                 1837






    2.                             Proton                        + ve                             1.00758                        1 amu                          In nucleus





    3.                             Neutron                       Chargeless                       1.00898                        1 amu                          In nucleus
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