Atomic Research

Until the final years of the 19th century, the accepted model of the subdivision 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 unfeigned of the electron. Thomsons fake suggested that the atom was not an indivisible blood corpuscle as fast matchless Dalton had suggested but, a jigsaw puzzle make of grimer 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 wind toward a positively charged electric plate. Thomson theorized, and was later turn out correct, that the stream was in fact made up of small particles, pieces of atoms that carried a oppose charge. These parti cles were later named electrons. After Eugen Goldsteins 1886 husking 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 slur of positive charges.

In 1908, Ernest Rutherford, a former student of Thomsons, proven Thomsons raisin bread structure incorrect. Rutherford performed a series of experiments with radioactive of import particles.  While it was unclear at the time what the of import particle was, it was known to be very tiny.  Rutherford fired tiny al pha particles at solid objects much(prenomi! nal) as meretricious foil.  He base that while close to of the alpha particles passed right through the gold 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 interchangeable a lawn tennis ball hitting a wall.  Rutherfords experiments suggested that gold foil, and matter in general, had holes in it!  These holes allowed most of...If you want to happen a teeming essay, order it on our website: BestEssayCheap.com

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