Page 1 - 2.LESSON NOTES-INTRODUCTION OF THE CHAPTER AND MIND MAP
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SAI International School
                                                       Class-IX
                                                Subject- Chemistry

                                             Topic-Structure of atom
                                            Mind map and introduction
                                                    Lesson Notes

              To be done in CW Copy

















































            Sub Atomic Particles of an Atom and Their Discovery
            Thomson’s Model of atom
            Rutherford’s Model of Atom
            Bohr’s Model of Atom
            Arrangement of electrons in an atom:
            Orbit
            Valency
            Atomic number
            Mass number
            Isotopes
            Isobars

              Failure of Dalton’s Atomic Theory


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