The Plum Pudding Model

Once Thomson discovered the presence of electrons in the atom the solid sphere model was no longer accurate. The new model proposed by Thomson was called the Plum Pudding model (a popular dessert at the time). In the model it was suggested that the negatively charged particles, the electrons, were contained within a positively charge body. The bulk of the atom was considered to be positively charged and the electrons moved rapidly throughout the medium.