Jj Thomson Essay

THOMSON, MILLIKAN, CROOKES, AND THE ATOM

J. J. Thomson was born in Cheetham Hill, Manchester, United Kingdom, December 18, 1856. Died August 30th, 1840, Cambridge, United Kingdom.

1870-Entered Owens College, Manchester

1876-Entered Trinity College, Cambridge

1880-Became a Fellow of Trinity College

1883-Became a Lecturer at the college, 1918-Became a master

1884-1918-Cavendish Professor of Experimental Physics at Cambridge, Honorary Professor of Physics

1884-Adams Prize

Study of cathode rays culminated discovery of the electron by use of positive rayas, separating different atoms and molecules.

Knighted 1908, Nobel Prize for Physics in 1937

Proved atoms composed of aggregates of charged particles.

Up until then, the atom was believed to be the sole smallest particle of all matter, however, JJ Thomson made a discovery and conclusion that all matter was made up of electrical particles that were similar and even smaller than the actual atom in 1897. He originally called them corpuscles, but now are know as electrons. He discovered that in cathrode rays, the atoms in these rays contained negatively charged particles. These particles also remained constant throughout all atoms. He developed a new atom model that represented the elcontron particles but did not include positive particles.

He proved the rays were negatively charged energy known as electrons.

Cathode rays occur when electric current is driven through a containment where all gas has been pumped out.

Ernest Rutherford, A student of JJ Thomson proved his plum pludding structure wrong. A series of experiments showed that alpha particles passed through gold foil, pointing out that in beams of energy, not all particles passed through gold foil, as said by JJ Thomson. He concluded that the atom not only had negatively charged particles, it also contained positive