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J.J. Thomson

J.J. Thomson. By Katie Rogers and Tricia Maciolek. Background.

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J.J. Thomson

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  1. J.J. Thomson By Katie Rogers and Tricia Maciolek

  2. Background • Joseph John Thomson was born in Cheetham Hill, England, on December 18th, 1856. At the age of 14, he enrolled at Owen’s College. J.J. Thomson was planning to be an engineer, but his father’s death caused his family to be unable to afford the cost of the program. He instead decided to major in math and physical sciences on a scholarship at Trinity College. In 1890, he married Rose Elizabeth Paget and a had two children, a son and a daughter. He died on August 30th, 1940.

  3. What he did • J.J. Thomson discovered the electron in 1897. • He wrote many books including Elements of the Mathematical Theory of Electricity and Magnetism. • He won the Nobel Prize in Physics in 1906.

  4. Scientific research • J.J. Thomson was a physicist. He was very intelligent. He started college at the age of 14. He spent a lot of time doing experiments and research. He also did many speeches and wrote many books on his work. His biggest discovery was the electron. This was a major contribution to the atomic structure. J.J. Thomson is a very important figure in science because atoms play a big role in chemistry. The electron was a major discovery that will not be forgotten.

  5. Major contributions • J.J. Thomson discovered the electron. Electrons are the negatively charged particles in an atom. • He also discovered isotopes. Isotopes are atoms with extra neutrons or less neutrons. • J.J. Thomson won the Nobel Prize in Physics in 1906. • His model of the atomic structure was called the Plum Pudding Model.

  6. The plum pudding model • In J.J. Thomson’s Plum Pudding Model, electrons (plums) were embedded in the atom. They were surrounded by positively charged matter (pudding). The negative and the positive balanced each other out.

  7. Experiments • He did many experiments with cathode rays to discover the electron. Cathode rays are streams of electrons. • J.J Thomson’s experiment consisted of firing cathode rays into a metal tube. The metal tube was able to measure the electric charges. • This experiment proved that atoms had negative particles. • He also conducted two other experiments on the subject of electrons.

  8. Affects of discovery • J.J. Thomson’s discovery changed the way people viewed the atom. • Without electrons, we would still think the atom was all positively charged. • He discovered that different elements have different weights. This helped us better understand the atom.

  9. Works cited • Discovery fo the Electron. (n.d.). J. J. Thomson. Retrieved October 13, 2011, from http://en.wikipedia.org/‌wiki/‌J._J._Thomson • Elements of the mathematical theory of electricity and magnetism. (n.d.). Retrieved from http://www.google.com/‌search?tbm=isch&hl=en&source=hp&biw=1024&bih=571&q=jj+thomson+cathode+ray+experiment&gbv=2&oq=jj+thomson+cathode+ray+experiment&aq=f&aqi=g1&aql=&gs_sm=e&gs_upl=2782l10782l0l11047l33l32l0l23l23l0l250l1201l5.2.2l9l0#hl=en&gbv=2&tbm=isch&sa=X&ei=d22YTsegB8bZ0QHUy6jSBA&ved=0CD0QvwUoAQ&q=elements+of+the+mathematical+theory+of+electricity+and+magnetism&spell=1&bav=on.2,or.r_gc.r_pw.,cf.osb&fp=f9015228e7cca3b1&biw=1024&bih=571 • J.J. Thomson cathode ray experiment. (n.d.). Retrieved from http://1.bp.blogspot.com/‌_CBwb08UCtuQ/‌TFqSjq5291I/‌AAAAAAAAAwA/‌hguTrAaaigQ/‌s1600/‌cathode+rays.jpg • J.J. Thomson’s cathode ray experiment. (n.d.). Retrieved October 14, 2011, from http://www.experiment-resources.com/‌cathode-ray.html • Joseph James Thomson biography. (n.d.). Retrieved from Nobel Prize website: http://www.nobelprize.org/‌nobel_prizes/‌physics/‌laureates/‌1906/‌thomson-bio.html

  10. Works Cited (cont) • Joseph John Tomson. (n.d.). Retrieved from http://ic.galegroup.com/‌ic/‌scic/‌ReferenceDetailsPage/‌ReferenceDetailsWindow?displayGroupName=Reference&disableHighlighting=false&prodId=SCIC&action=e&windowstate=normal&catId=&documentId=GALE%7CK1648000659&mode=view • Joseph Thomson. (n.d.). Retrieved from http://www.daviddarling.info/‌images/‌Thomson_Joseph.jpg • Plum pudding model. (n.d.). Retrieved from http://en.wikipedia.org/‌wiki/‌Plum_pudding_model • Thomson, S. G. P. (n.d.). Britannica biographies. Retrieved from http://web.ebscohost.com/‌src/‌detail?vid=3&hid=107&sid=050e9a1c-2c7b-4949-b53f-42647c3de9d8%40sessionmgr110&bdata=JnNpdGU9c3JjLWxpdmU%3d#db=ulh&AN=32425106

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