The Division of Adolescent Medicine provides primary and consultation services for adolescents and young adults between 12 and 21 years of age. We have a separate waiting room and examination area for these patients and offer services tailored to their needs and health care issues.
Modern atomic theory is generally said to begin with John Dalton, an English chemist and meteorologist who in 1808 published a book on the atmosphere and the behavior of gases that was entitled A New System of Chemical Philosophy.
The Atom had been introduced by Democritus. Aristotle did not believe in the Atom Theory. Aristotle believed that all matter was made of The Four Elements which are Fire, Earth, Air, and Water. He did not have any proof to support his theory. The Atom Theory had no proof as well.