Question

All the gases form 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?

Answer 1

(i) Formation of cathode rays tells us that atoms contain negatively charged particles (electrons) inside them.
(ii) Formation of anode rays tells us that atoms contain positively charged particles (protons) in them.