The atomic theory of JJ Thompson was derived presented by examining problems discovered in the Dalton model. His work with charged particles in a ray tube being attracted to a positive charge on the outside of a part of the tube led to the discovery of negative particles in the atom. He named these electrons. Diagrams of his atom as seeds in a watermelon, or raisins in rice pudding were used to present his theory. The shortcomings of his theory were corrected by his student, Rutherford, in his presentation of the structure of the atom. HIs alpha particle scattering was used to arrive at his discovery and definition of the nucleus of the atom and the presence of protons