According to this model, the atom consists of the positively charged sphere and the electrons are embedded in it. The charges are equal in magnitude but opposite in sign, so the atom is neutral.
The limitations of J. J. Thomson's model of the atom is:
1. Thomson’s model couldn’t explain the stability of the atom. According to this model negatively charged particles are embedded in positive charge, but this model failed to explain how positive and negative charges could remain so close together.
2. This model was unable to explain the experiments performed by other scientists.
3. In this model there was no mention of the nucleus of an atom.