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Democritus
He though that everything is made up of these “atmos” particles that are so small that they can’t be broken down any more. -
John Dalton
John belived that elements are made of extremely small particles called atoms. In chemical reactions, atoms are combined, separated, or rearranged. -
William Crookes
Will invented a tube that he could see particals, and atoms through. -
J.J. Thomson
Thomson experimented with crookes tube, and used a magnet to try to direct the beam. -
Ernst Rutherford
Rutherford started to work with J. J. Thomson on the conductive effects of X-rays on gases, work which led to the discovery of the electron which Thomson presented to the world in 1897. -
Neils Bohr
A negatively charged electron, to an atomic orbital, orbits a small, positively charged nucleus. -
Aristotle
Aristotle thought that everything is made up of four elements; Earth, Wind, Water, and Fire. He also belived in "atmos" a thing like atoms.
