GENERAL KNOWLEDGE

Detailed explanation-1: -In the year 1897 J.J. Thomson invented the electron by playing with a tube that was Crookes, or cathode ray. He had shown that the cathode rays were charged negatively. Thomson realized that the accepted model of an atom did not account for the particles charged negatively or positively.

Detailed explanation-2: -In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas.

Detailed explanation-3: -Thomson, during a lecture at the Royal Institution in London, on 30 April 1897. “The atoms of the ordinary elements are made up of corpuscles and holes, the holes being predominant, ‘’ he continued. Thomson described his experiments with cathode rays to verify the existence of these subatomic corpuscles.