Answer the following:

Describe J.J. Thomson’s experiment on the discovery of electrons.

J.J. Thomson’s experiment on the discovery of electrons:

i. J.J Thomson conducted the experiment using discharge tube apparatus.

ii. A discharge tube is glass tube connected to a vacuum pump.

iii. Metal electrodes are fixed to the ends of the glass tube.

iv. He created a very low pressure inside the discharge tube and applied high voltage.

v. The rays released from cathode are called cathode rays.

vi. He named these particles as electrons (negatively charged particles).

vii. The electron is much lighter than the hydrogen atom.