Development of the Atom A brief review of the history… 20map.htm.
II. The Structure of Atoms Atom – smallest particle of an element that retains the chemical properties of that element. All atoms consist of 2 regions.
Joseph John Thomson, an English scientist, provided the first hint that an atom is made of even smaller particles. He observed that there are NEGATIVELY.
Rutherford’s Gold Foil Experiment Rutherford’s Apparatus beam of alpha particles radioactive substance gold foil circular ZnS - coated fluorescent screen.
