Discoveries in chemistry led to a better understanding of atomic structure. Atoms were originally thought to be tiny spheres that could not be divided. The plum pudding model of the atom was then developed. Figure 10 represents the plum pudding model of the atom. Describe the plum pudding model of the atom.

The plum pudding model, proposed by J.J. Thomson after his discovery of the electron, described the atom as a uniform sphere (or "ball") of positive charge. Scattered throughout this positive sphere were the negatively charged electrons, much like plums (or raisins) in a pudding. The overall charge of the atom was neutral because the total negative charge of the electrons balanced the total positive charge of the sphere.