Who discovered protons, electrons and neutrons?

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. read more

Question Date: 2003-06-07: Answer 1: Experiments by J.J. Thomson in 1897 led to the discovery of a fundamental building block of matter one hundred years ago, the British physicist J.J. Thomson was venturing into the interior of the atom. read more

Neutron-The neutron was discovered in 1932 by the English physicist James Chadwick. In 1920, Ernest Rutherford postulated that there were neutral, massive particles in the nucleus of atoms. read more