Discovery of Proton: Goldstein Experiment

When was the first proton discovered?

- 1909
In 1909, Rutherford discovered proton in his famous gold foil experiment.

How did Goldstein discover the proton?
Discovery of the Proton

Using a cathode ray tube with holes in the cathode, he noticed that there were rays traveling in the opposite direction from the cathode rays. He called these canal rays and showed that they were composed of positively charged particles.

Who is father of Proton?
Ernest Rutherford
The proton was discovered by Ernest Rutherford in the early 1900's. During this period, his research resulted in a nuclear reaction which led to the first 'splitting' of the atom, where he discovered protons. He named his discovery “protons” based on the Greek word “protos” which means first.

What does a proton look like?
As every student learns in physics class, a proton is a very small (about 1.6 femtometers [10-15 meters] in diameter) positively charged subatomic particle found in the nucleus of an atom. ... A proton is made of two “up” quarks and one “down” quark.