All the gases from cathode rays and anode rays when electricity is passed through them :(i) What does the formation of cathode rays tell us about the atoms?(ii) What does the formation of anode rays tell us about the atoms?

(i) A cathode ray is a stream of high-velocity electrons that are produced in a vacuum tube between a negatively charged cathode and a positively charged anode. The formation of cathode rays tells about the presence of electrons in all the atoms.

(ii) When a perforated cathode is used in a discharge tube, another set of rays traveling in the direction opposite to that of the cathode rays is seen. These are called anode rays. The formation of anode rays tells about the presence of protons in all the atoms.