The History of Atomic Chemistry: Crash Course Chemistry #37
History of the Atom (Atomic Theory)
Early Atomic Theory: Dalton, Thomson, Ruthorford and Millikan
Models of the Atom Timeline
In chemistry and physics, atomic theory is a scientific theory of the nature of matter, which states that matter is composed of discrete units called atoms. It began as a philosophical concept in ancient Greece and entered the scientific mainstream in the early 19th century when discoveries in the field of chemistry showed that matter did indeed behave as if it were made up of atoms.
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