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.
Where does the word atom come from and who first used this word? Around 2,500 years ago this Greek dude name Democritus was sitting around just thinking. He was thinking about cutting stuff up and came up with the idea that there must be a point where you could no longer cut something any smaller. He named the atom after the Greek word atomos, which means 'that which can't be split.' The cool part is that he was right. Well, 90% right. We can split atoms, but if you split an atom it becomes something else. An atom is the smallest unit of a particular kind of material.