Atomic Research

Until the final years of the nineteenth century, the accepted model of the member resembled that of a billiard ball - a refined, solid sphere. In 1897, J. J. Thomson dramatically changed the modern view of the atom with his disco reliable of the electron. Thomsons fake suggested that the atom was not an indivisible blood cell as fast unrivalled Dalton had suggested but, a jigsaw puzzle make of microscopicer pieces. Thomsons thought of the electron came from his work with a nineteenth century scientific curiosity: the cathode ray tube. For years scientists had cognize that if an electric live was passed through a vacuum tube, a stream of radiance material could be seen; however, no one could explain why. Thomson strand that the mysterious glowing stream would obviate toward a positively charged electric plate. Thomson theorized, and was later turn up correct, that the stream was in fact made up of small particles, pieces of atoms that carried a oppose charge. These p articles were later named electrons. After Eugen Goldsteins 1886 breakthrough that atoms had positive charges, Thomson imagined that atoms looked wish well pieces of raisin bread, a structure in which clumps of small, negatively charged electrons (the raisins) were scattered inside a situation of positive charges. In 1908, Ernest Rutherford, a former student of Thomsons, proved Thomsons raisin bread structure incorrect. Rutherford performed a series of experiments with radioactive important particles.  While it was unclear at the time what the alpha particle was, it was known to be very tiny.  Rutherford fired tiny alpha particles at solid objects much(prenominal) as prosperous foil.  He instal that while close to of the alpha particles passed right through the currency foil, a small number of alpha particles passed through at an angle (as if they had bumped up against something) and some bounced straight back comparable a lawn tennis ball hitting a wall.  Rutherf ords experiments suggested that gold foil, a! nd matter in general, had holes in it!  These holes allowed most of...If you want to repair a teeming essay, order it on our website: BestEssayCheap.com

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