1875-1900+(Smedile.Enrique)

October 9, 1852- July 15, 1919 Country of Origin: Germany Year of Discovery:1882 
 * Hermann Emil Fischer **

Fisher started attending Universities at the age of 18. Although he was not a good public speaker, his memory served him well. He lost two sons, one from WWI and another took his own life. Fischer received his doctorate from The University of Strasbourg. He worked many positions at scientific institutes in Germany but ultimately settled down as the Chair of Chemistry at the University of Berlin. In 1882 Fisher discovered that “adenine, xanthine, in vegetable substances, caffeine, and animal excrete, uric acid, and guanine all belonged to one homogeneous family and could be derived from one another.”

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August 30, 1852- March 1, 1911 Country of Origin: The Netherlands Year of Discovery: 1884
 * Jacobus Henricus van 't Hoff **

Jacobus obtained his doctorate degree in Holland in Utrecht. After holding many teaching positions he was in invited to Berlin to be an honorary professor. He made this change in order to focus more on his own research rather than teaching elementary chemistry. His major discovery was proving osmotic pressure is proportional to concentration and absolute temperature. This showed that thermodynamic laws are valid for gasses and dilute solutions.

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 Svante August Arrhenius 19 February 1859 – 2 October 1927 Country of origin: Sweden Year of discovery: 1884

At an early age Arrhenius had shown talent for arithmetic calculations. In 1884 he received his doctorate from Uppsala. He is known for research on electrolyte concentrations. Such as how neither pure salt nor pure water is conductors, but when mixed together they are. Also, he did research on the boiling/freezing points of solutions containing electrolytes. He is also known for being the first man to predict global warming. He noticed a correlation between carbon dioxide in the atmosphere and the global temperature. This lead him to predict that if man continued to burn coal the global temperature would rise.

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20 october 1891-july 24 1974 England
 * James Chadwick**


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Born in England Chadwick attended school threw college. Some time later he started to work with Ernest Rutherford. During WWI he was interned to a POW camp in Germany. He was aloud to build a lab in a stable. During his research in Cambridge he discovered an unknown partial of the nuclease of atoms and soon became the neutron where there is a lack of charge. This discovery helped the creation of element heavier than uranium. He then helped out with the creation on atomic power and the atomic bomb.

www.britannica.com/EBchecked/topic/.../Sir-**James**-**Chadwick**

March 27, 1845- February 10, 1923 Country of Origin: Germany Year of Discovery:1895
 * Wilhelm Conrad Röntgen **



Wilhelm was known for being a modest man despite receiving many awards and honors. He was also known for his love of nature. Much of him time was spent at his summer home in the Alps where he loved to go hiking and often times got into dangerous situations. Rontgen was a shy man and did not work with an assistant. Most of his equipment was built by him through great ingenuity and experimentation. His biggest contribution to chemistry was in 1895 when he discovered X-rays. It happened one evening when he noticed a sample of barium platinocyanide became florescent over two meters away from the discharge tube. He later put his wife’s hand in front of these ways and was able to capture a picture of her bones.

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December 18, 1856- August 30, 1940 Country of Origin: England Year of Discovery:1897  Thompson was the son of a book seller in England. He went off to college in Cambridge when he was only 14. During the 1880's many scientist felt that science was coming to an end because everything had been discovered. In 1897 Thompson discovered the electron. He did this by using a Crooks Tube. When the tube was activated it moved a line of electrons across it. Thompson moved a magnet to the tube and noticed that the line was moved. He then concluded that the line in the tube was tiny negatively charged particles known as electrons. With this discovery also came Thompson’s new model of the atom known as the "Plum Pudding" model. []
 * Sir Joeseph John Thompson**

