Question

based on the article \will the real atomic model please stand up?\, why did j.j. thomson experiment with cathode - ray tubes?

• to specifically identify the nucleus as a separate part of an atom
• to determine that electric beams in cathode - ray tubes were actually made of particles
• to prove john dalton and democritus wrong
• to determine the exact energy output of cathode - ray tubes

Explanation:

J.J. Thomson experimented with cathode - ray tubes to show that electric beams in them were made of particles (electrons). He did not aim to specifically identify the nucleus, prove Dalton and Democritus wrong, or determine the energy output of cathode - ray tubes.

Answer:

to determine that electric beams in cathode ray tubes were actually made of particles