jan 24, 1904 - Plum Pudding Atomic Model
Description:
J. J. Thomson, who discovered the electron in 1897, proposed the plum pudding model of the atom in 1904 before the discovery of the atomic nucleus in order to include the electron in the atomic model. In Thomson's model, the atom is composed of electrons (which Thomson still called “corpuscles,” though G. J.Added to timeline:
Date:
jan 24, 1904
Now
~ 121 years ago