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Atomic Model Project

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Ve'lesa Dunlap

on 4 October 2012

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Transcript of Atomic Model Project

Ve'lesa Dunlap Atomic Model Project -Born In Abdera, Thrace, Greece Democritus Earnest Rutherford Joseph John Thomson Robert A. Millikan -Died 370 B.C. -Made Discovery in 400 B.C. - Democritus developed the atomic theory. His theory was that atoms are all individually created and cannot be separated "indivisible". Between atoms, lie empty space. Atoms cannot be split no matter what their size. -Democritus is renowned for his atomic theory John Dalton -Renowned for his development of the modern atomic theory and research in color blindness -Born in Eaglesfield, Cumberland, England -Died July 27, 1844 -Dalton conducted his experiment in 1803. Dalton's theory was: All matter consisted of tiny particles; atoms are indestructible and unchangeable; elements are characterized by the mass of their atoms; when elements react, their atoms combine in simple, whole-number ratios; when elements react, their atoms sometimes combine in more than one simple, whole-number ratio Atomic Theory Atomic Theory -Died August 30, 1940 -Born In Manchester, Lanshire, United Kingdom -Renowned for the discovery of the electrons - Thomson's experiment put foward a then controversial theory in which cathode rays were made up of streams of particles much smaller than atoms. He called these particles corpuscles. His theory was not supported and later the cathode rays became known as electrons. This is said to be discovered in 1897. -This discovery was significant because electron were founded -Born In Spring Grove , New Zealand -Died October 19, 1937 -In 1911, Earnest performed an experiment to test the plum pudding model. He aimed a beam of alpha particles at a piece of gold foil. To be more accurate Rutherford actually included a wide variety of foils, but his use of gold foil is most commonly spoken of. In accordance to the J.J. Thomson model of an atom, the alpha particles should have passed directly through the gold foil for all instances -Discovered Radioactive Half-Life & Gold Foil -Born In Morrison, Illinois -Died On December 19, 153 -In 1909 performed the oil drop experiment to measure the size of an electron. He also determined that there was a small unit charge. He received a Nobel Prize for his work http://ffden-2.phys.uaf.edu/212_fall2003.web.dir/ryan_mcallister/slide3.htm -This experiment is significant because the charged of an electron was found. Erwin Schrodinger -Died January 4, 1961 -Born in Vienna, Austria-Hungary -Schrodinger developed the Quantum Mechanics . It formed the basis of wave mechanics: he formulated the wave equation ad revealed the identity of his development of the formalism and matrix mechanics. The issues raised by his 1935 cat experiment perhaps remain his best known legacy. -His discovery was the 2nd formulations of quantum mechanics Eugene Goldstein -Died December 25, 1930 James Chadwick -He discovered anode rays in 1886, the positively-charged particles formed when electrons are removed from the gas particles in cathode-ray tube. He showed that cathode rays can cast shadows, then demonstrated how such rays are shown. - Born in Gleiwitz, Upper Silesia -His experiment is significant because he discovered ancode rays -Died July 24, 1974 -Born in Bolington, Cheshire, England -His experiment was significant because he discovered the neutron -He discovered the neutron in 1932, resulting in the solution of the jig-saw puzzle for the weight of atoms. His discovery formed the base for the investigation of the tougher questions of nuclear physics: the nature of the nucleus and its force. http://www.light-science.com/chadwick.html http://www.nndb.com/people/790/000087529/ http://www.nobelprize.org/nobel_prizes/chemistry/laureates/1908/rutherford-bio.html http://www.nobelprize.org/nobel_prizes/physics/laureates/1906/thomson-bio.html http://www.nobelprize.org/nobel_prizes/physics/laureates/1933/schrodinger-bio.html http://chemed.chem.purdue.edu/genchem/history/goldstein.html Oil Drop Experiment Plum Pudding Model Gold Foil Experiment Ancode Rays Quantum Mechanics Experiment Neutron Experiment
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