History of the atom as we know it. Jesse L. Enriquez By JesseL.enrq 1803 Discovery of the sphere model John dalton discovers the sphere model 1904 Discovery of the plum pudding model 1911 Discovery of the nuclear model Ruther ford discovers the nuclear model. 1913 Discovery of the plabetary model 1926 Discovery of the quantum mechanical model Erwin Schrodinger discovers this model Feb 2, 2021 today