Page 1 - MM
P. 1

SAI International School

                                                      Class-IX
                                              Subject- Chemistry
                                         Topic-Atoms and Molecules

           SubTopic-Ions (positive ion and negative ion), calculations of valency of

                                                        ions
                                                     MIND MAP





                                                                             CATIONS




                                                                        Formed by loss of electrons

                                                                        Carry +ve charge

                                                                        Smaller than parent atom

                                                                        Move towards Cathode
                                                                        during electrolysis



                      IONS






                                                                               ANIONS




                                                                       Formed by gain of
                                                                       electrons

                                                                       Carry -ve charge

                                                                       Larger than parent

                                                                       atomMove towards Anode
                                                                       during electrolysis











          1
   1