Q. Determine Mass to charge ratio of the electron?

Ans.

Eventually, Thomson was able to find the ratio of the electron's mass to its electrical charge (m/e). Regardless of what type of gas was in the cathode ray tube, the mass-to-charge ratio of the electron was always the same value. This mass-to-charge (m/e) value was:

m/e = 5.69 x 10^-9 grams/coulomb

(The coulomb measures electrical charge.)

Therefore, Thomson could conclude that the electron was a fundamental particle that was found in all atoms. For this accomplishment, Thomson was awarded the Nobel Prize in 1906.