-
440
democritus
atoms are uncuttable -
440
democritus
atoms constantly move -
440
democritus
atoms are hsmall,hard particles -
dalton
elements combine in specific proportions -
Dalton
Atoms of different elements are different -
Dalton
Atoms of the same element are exact -
Dalton
All substances are made of atoms -
dalton
he conducted experiments in combinig elements -
Thompson
There all small, negatively charged particles particles in an atoms