J. J. Thomson discovered the electron in experiments done in 1897.
Rutherford proposed the existence of neutron
Spearman
who
John Dalton, I believe.
Nainital
That would be Alfred Wegener
They proposed the term of electron microscope and they developed the idea of electron lenses into a practical reality and demonstrated electron images taken on the instrument
Bohr proposed that an electron is found only in specific circular paths, or orbits, around the nucleus.
J.J. Thompson proved the electron's existence through the cathode ray experiment.
In 1924 de Broglie proposed that a material particle such as an electron might have a dual nature.
J.J. Thomson discovered the electron in 1897.
Friedrich Hermann Hund