# Thomson discovered a subatomic particle while working with the cathode ray tube. What is the particle known as?

Scientist J.J.Thomson discovered electrons $\left({e}^{-}\right)$.
In the Cathode ray tube, a beam of cathode rays emitted from the Cathode. The ray was illuminating at a certain pressure. The cathode rays contained very small negatively charged subatomic particles called electrons $\left({e}^{-}\right) .$