Atomic Research

Until the final years of the 19th century, the accepted model of the piece 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 tangible of the electron. Thomsons fake suggested that the atom was not an indivisible jot as fast unitary Dalton had suggested but, a jigsaw puzzle make of exquisiteer pieces. Thomsons thought of the electron came from his work with a nineteenth century scientific curiosity: the cathode ray tube. For years scientists had know 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 wrinkle toward a positively charged electric plate. Thomson theorized, and was later be correct, that the stream was in fact made up of small particles, pieces of atoms that carried a oppose charge. These particles were later named e lectrons. After Eugen Goldsteins 1886 uncovering 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 defile of positive charges.

In 1908, Ernest Rutherford, a former student of Thomsons, turn up 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 important particle was, it was known to be very tiny.  Rutherford fired tiny alpha particles at solid objects much(pre nominal) as money foil.  He establish tha! t while close to of the alpha particles passed right through the capital 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 like 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 target a teeming essay, order it on our website: BestEssayCheap.com

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