J.J. Thomson made use of cathode rays to investigate atomic structure by passing electric current through a partially evacuated glass tube that contains two metal plates known as electrodes. The electric current ionizes the gas molecules and produces a stream of electrons called cathode rays that travel from the negatively charged electrode (cathode) to the positively charged electrode (anode).
Thomson concluded that cathode rays are negatively charged particles known as electrons. He also discovered that the mass-to-charge ratio of these electrons is much smaller than the mass-to-charge ratio of hydrogen ions, which are the lightest known atomic species. Based on this discovery, Thomson suggested that atoms must contain smaller negatively charged particles embedded within a positively charged sphere. This model became known as the "plum pudding" model of the atom.
Thomson's discovery of the electron revolutionized the study of atomic structure and paved the way for future scientists to develop more accurate models of the atom.
howndid J. J. Thomsom
make use of cathode rays investigate atomic structure? What dđ he conclude based on his results?
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1 answer