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John Dalton Formed The Atomic Theory
found that gases only could be combined in certain proportions even if two different compounds shared the same common element or group of elements and that elements combine at the atomic level in fixed ratios. Jessa, Tega. "John Dalton’s Atomic Model." Universe Today RSS. N.p., 24 Aug. 2009. Web. 05 Oct. 2014. -
J.J. Thompson Discovered The Electron
In 1897 he reported that "cathode rays" were actually negatively charged particles in motion; he argued that the charged particles weighed much less than the lightest atom and were in fact constituents of atoms. "Discovery of the Electron: J. J. Thomson." Discovery of the Electron: J. J. Thomson. N.p., n.d. Web. 05 Oct. 2014. Picture:
http://sdsu-physics.org/physics180/physics196/images_196/Thompson_model.jpg -
Albert Einstein
Created the general theory of relativity "Albert Einstein." History.com. A&E Television Networks, n.d. Web. 6 Oct. 2014. "General Relativity." General Relativity. N.p., n.d. Web. 06 Oct. 2014. -
Robert Millikan
the accurate determination of the charge carried by an electron, using the elegant "falling-drop method"; he also proved that this quantity was a constant for all electrons. "Robert A. Millikan - Biographical." Nobelprize.org. N.p., n.d. Web. 6 Oct. 2014. -
Ernest Rutherford
discovered alpha and beta rays, set forth the laws of radioactive decay, identified alpha particles as helium nuclei, and he postulated the nuclear structure of the atom. when alpha particles are fired into gas atoms, a few are violently deflected, which implies a dense, positively charged central region containing most of the atomic mass "Ernest Rutherford | Chemical Heritage Foundation." Ernest Rutherford | Chemical Heritage Foundation. N.p., n.d. Web. 6 Oct. 2014. -
Neils Bohr
his substantial contributions to quantum theory and his research on the structure of atoms. he created the bohr model. Palermo, Elizabeth. "Niels Bohr: Biography & Atomic Theory." LiveScience. TechMedia Network, 14 May 2013. Web. 6 Oct. 2014. Bohr Model Picture:
http://atomic.lindahall.org/siteart/questions/bohr-attom-of-calcium_lg.jpg -
Erwin Schrödinger
He suggested that electrons behave in a wave-like manner rather than just as particles and that their exact location within an orbit could not be precisely calculated. "Electron Arrangement and Schrodinger's Atomic Model." Green Planet Solar Energy. Web. 06 Oct. 2014. http://www.green-planet-solar-energy.com/electron-arrangement.html.
