The Atomic Theory of Matter and the Discovery of
Chapter , Problem 16E(choose chapter or problem)
An unknown particle is caused to move between two electrically charged plates, as illustrated in Figure 2.8. Its path is deflected by a smaller magnitude in the opposite direction from that of a beta particle. What can you conclude about the charge and mass of this unknown particle?
J. J. Thomson’s plum-pudding model of the atom. Ernest Rutherford and Ernest Marsden proved this model wrong.
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