Part one of term paper
ELECTRON- In 1897, Sir J. J. Thomas, an English physicist, measured the deflection of cathode-ray particles in magnetic and electrical fields. As a result he found the ratio of the charge, e, to the mass, m, of the cathode-ray particles. He found e/m identical to those particles irrespective of the metal the electrodes were made of or the ...

Part two of term paper
... tube with holes in the cathode, and observed that another kind of ray was emitted from the anode and passed through the holes. He discovered this in 1886. In 1889, William Wien showed these rays to be positively charged. The ratio of charge to mass was smaller than electrons, but varied in different gasses. This meant that either charge varied, mass varied or both varied. Both vary. Charge is equal to an electron, but opposite in sign. Mass was smaller when used as a gas. From the values ...