Question

What did J.J. Thomson’s experiments with cathode ray tubes imply about the mass of an electron?

Answer 1

Answer: Thomson's experiment revealed that cathode rays are composed of negatively charged particles called electrons. He also determined that the charge to mass ratio of electrons which was much greater (about 2000 times) than that of the proton.

Explanation: Electrons are many thousand times smaller than the nucleus and negatively charged.

J.J Thomson in his first experiment with cathode-ray tube discovered that cathode rays and the charge that was deposited are intrinsically linked together.

In his second experiment, he discovered that the charge in the cathode ray tube was negative. And from that, he deduces that cathode rays are made of negatively charged particles.