History of the models of the atom By teachersname1 100 Democritus's invents of atomos (BC) Demoncritus postulates a theory whereby the smallest particle is the atom, or atomos - "uncuttable". Jan 1, 1803 John Dalton proposes atomic theory John Daltons Theory John Dalton used experimental evidence to put forward his atomic theory which had 5 postulates Jan 1, 1904 J.J THOMSON puts forward his plum pudding model
