Why did Thomson's results from experimenting with cathode rays a big change in scientific thought about atoms?

Thomson's results from experiments with cathode ray tubes produced a big change in scientific thought about atoms because his results gave the first evidence that atoms were made of smaller particles.

Particularly, he proved the existence of negatively charged sub-atomic particles that are called as electrons which together with a positively charged nucleus form an atomic unit.

Thomson's plum pudding model of the atom had negatively-charged electrons embedded within a positively-charged "soup." Thomson also made the following conclusions from his experiment:

Initially it was controversial, but later Thomson's discoveries were gradually accepted by scientists. After then, his cathode ray particles were given a  name called as electrons.