Neither of them did.
The neutron was discovered long after either of them had done most of their major work.
Proton discovered by Ernest Rutherford Neutron discovered by James Chadwick Electron discovered by J. J. Thomson
Ernest Rutherford
Ernest Rutherford was responsible for the Gold Foil experiment. A great portion of Ernest Rutherford's research included the study of alpha particles.
Ernest Rutherford predicted the existence of the neutron, but it was Sir James Chadwick that is credited for the actual discovery of the neutron.
Ernest Rutherford predicted the nucleus in 1920, 12 years later his assistant James Chadwick found and confirmed it.
Proton discovered by Ernest Rutherford Neutron discovered by James Chadwick Electron discovered by J. J. Thomson
Nucleus: ernest Rutherford neutron: James chadwick protons: ernest Rutherford electron: democritus atom: john Dalton
Particles in the atom: Neutron: James Chadwick, 1932 Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919
Neutron: James Chadwick, 1932 Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919
Electron: J. J. Thomson (1897) Proton: Ernest Rutherford (1920) Neutron: James Chadwick (1932) (nucleus : Rutherford 1911)
Neutron: James Chadwick, 1932 Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919
Neutron: James Chadwick, 1932 Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919
Rutherfordium was not discovered by Ernest Rutherford.
Electron: J. J. Thomson, 1897 Proton: Ernest Rutherford, 1919 Neutron: James Chadwick, 1932
Ernest Rutherford is not known for studies in magnetism.
There are 3 subatomic particles in an atom, electrons, protons, and neutrons. The first discovered was the electrons by J.J. Thomson in 1897. The second discovered was the protons by Ernest Rutherford in 1919. The third discovered was the neutrons by James Chadwick in 1932.
Ernest Rutherford described the existence of the neutron.