Fall.2010.MMA.Williamson.atomictimeline

**By: Sam Williamson **
 * Atomic History Timeline **
 * __//Ancient Times (450 AD and years prior) //__ **

__//**Leucippus (early 5th century-5th century) **//__  Leucippus was very weird because there really isn't any records of him. The only time anyone mentions Leucippus is when they talk about his successor, Democritus. Leucippus was most likely born in Miletus, but no one is 100 percent sure. Leucippus believed that everything is composed entirely of various imperishable, indivisible elements called atoms.



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__//**Democritus (460 - 370 B.C.)**//__ Democritus was born in Abdera, Thrace, Greece. Democritus was a student of Leucippus. He grew up in a time period of many great philosophers like Aristotle. He wasn’t the most famous philosopher but he had his group of followers. He described that atom as “the void” and “the infinite”. He said that we cant see atoms but with atoms all put together we can see bulky or real objects. he believed that everything in the universe was made up of atoms.

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__// ** Aristotle (384 - 322 B.C.) ** //__ Aristotle was born in Stageira, Chalcidice. He was the student of Plato, and a teacher of Alexander the Great. He wrote //a// bout many different subjects besides chemistry. He started his own school named Lyceum and had classes for 12 years. Aristotle believed that nature consisted of four elements: air, earth, fire, and water. Together these four elements made everything in the world.

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__//**1700-1800 **//__

Joseph was born in Bordeaux, France. His father was from Ireland and his mother was from Scotland. He had 12 brothers and sisters. When he was 18 he went to University of Glasglow. He worked with James Watt in some experiments that had to do with steam. He even has two Universities named after him. He is famous for his discoveries of Latent heat, specific heat, and carbon dioxide. He was very important in the chemistry world. []
 * //__Joseph Black (April 16, 1728 - December 6, 1799)__//**

//** Henry Cavendish (October 10, 1731 - February 24, 1810)**// Henry was born in Nice, France. His mother was Lady Anne Grey, and his father was Lord Charles Cavendish. He was a weird guy who didnt form any personal connection with anyone outside his family. He communicated threw notes to his servants. He went to the University of Cambridge, but left after four years and did not graduate. He did, however, make a paper while in school that was very important to his discovery. He is famous for his discovery of, what he called, inflammable air or hydrogen. He described hydrogen in the paper he wrote while in the university he did not graduate from.

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//**__Antoine Lavoisier (August 26, 1743 - May 8, 1794)__**// Antoine was born in Paris, France. He was a member of a very wealthy family and was very important in the history of chemistry. He was a part of the french enlightenment time period and got many ideas because of that. His mother passed away when he was five, and with that passing enherited a lot of money. He was involved in many experiments with oxygen and learned a lot about the element. He found out that in any state the mass stays the same. He also was the first to talk about a law of conservation of mass, and did experiments that supported that law. He even developed a new system of chemical nomenclature.

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__//**1800-1875**//__
 * //__John Dalton (September 6, 1766 - July 27, 1844)__//**