Electron=j.j.thomson

proton=gold stein

Neutron=chad wick

Hello Aspirant,

Experiments by J.J. Thomson in 1897 led to the discovery of a fundamental building block of matter one hundred years ago, and he discovered electrons. In 1911 Ernest Rutherford who performed many experiments to explore radioactivity did an experiment in which he discovered that the atom must have a concentrated positive center charge that contains most of the atom's mass. He suggested that the nucleus contained a particle with a positive charge the proton. In 1932, James Chadwick, an English physicist who had worked with Rutherford, detected neutrons and measured their mass in an invisible game of billiards.

All the best

Hi Sanjay,

The founders are mentioned below along with the elementary particles:-

• Neutron - James Chadwick in  1932
• Electron - J. J. Thomson in 1897
• Proton - Ernest Rutherford in 1920

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!