The Atom

Atom was discovered by Joseph J Thomson in,1897. Atom is the fundamental unit of all the materials. Atom may and may not exist in independent form ,for independent existence they form bond . There are different types of bonds and chains that is the cause of atom shapes.

                    ✓Respresention                    

                  Atoms are represented with capital letters . Only single capital letter is used to show an atom . First letter of any atom name is taken for symoblic representation. If two atoms have same beginning letter then we represent it with first letter in Capital form and second letter in small case .

   The central part of  an atom is called Nucleus.Nucleus is consists of Proton and Neutron. Proton has positive charge while Neutron has no charge. Electron  moves in a path called orbit. Electron has negative charge.

             ✓ Numbers in atoms

           Atomic Number

           Mass Number

          Atomic Number is the number of protons present in an atom. It is represented by symbol Z.

         Mass Number is the sum of protons and neutrons. It is represented by symbol A.