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Stack #4534692

QuestionAnswer
Democritus 460-370 BC first guy to come up with the idea of atoms matter=invisible atoms didnt do any experimentations so his ideas werent accepted.
Dalton 1803-1807 4 part atomic theory he thought atoms were solid spheres didn't do any experimentation but his theory was more widely acccepted
Thomson 1897 did the cathode ray tube experiment and it showed electrons for the first time because when they glowed it showed them and proved they have a negative charge.
Rutherford 1911 gold foil experiment brought light to the nucleus because all of the particles wouldnt go through the foil and they got bounced back because of the small dense nucleus in the center of the atom
Bohr 1913 discovered that electrons have a negative charge and that they orbit the nucleus like planets around the sun
Created by: #bookqueenl1l1
 

 



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