The limitation of Thomson’s model are described below :

1. Thomson’s model of an atom considers an atom to lae a sphere of uniform positive charge. Later researches particularly, Rutherford’s a-particle scattering experiment showed that an atom has a positively charged ‘core’ at its centre.
2. According to Thomson’s atomic model, mass of an atom is considered to be uniformly distributed. Rutherford’s experiment showed that the entire mass of an atom is concentrated inside the core of the atom.