These are the notes (and diagrams) I use when I teach ... Here is the model that he proposed. Thomson took the idea of the atom and tried to incorporate the evidence for the electron.

Most of the mass and all of the positive charge of an atom is in the nucleus. Most of an atom is empty space, (a vacuum). In 1897, the English born physicist, J J Thomson, was able to “rip ...

Limitations of Thomson’s Model: → It failed to explain how protons and electrons were arranged in atom so close to each other. (a) Most of the α – particles passed without any hindrance.