The very first subatomic particle discovered was the
A) muon.
B) quark.
C) proton.
D) electron.
E) neutron.

Question

Quizplus · Accepted Answer

The electron was the first subatomic particle to be discovered by J.J. Thomson in 1897 through his cathode ray experiments. The discovery of the proton came later in 1917 by Ernest Rutherford, and the neutron was discovered in 1932 by James Chadwick. The muon and quark were both discovered much later in the 20th century.

The Very First Subatomic Particle Discovered Was the