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 facts about the atomâs discovery are not easy to explain. John Dalton (late 1700s) was the first to perform experiments that determined atomic weight. But the ancients had already postulated its existence, though they werenât able to prove it.