![]() Although Democritus' theory was remarkable, it was rejected by Aristotle, one of the most influential philosophers of Ancient Greece and the atomic theory was ignored for nearly 2,000 years. Therefore, changes in matter were a result of dissociations or combinations of the atoms as they moved throughout the void. In addition, Democritus believed that the atoms differed in size and shape, were in constant motion in a void, collided with each other and during these collisions, could rebound or stick together. Democritus, theorized that atoms were specific to the material which they composed. Differences in atomic shape and size determined the various properties of matter. You learned earlier that all matter in the universe is made out of tiny building blocks called atoms. Summarize Daltons atomic theory and explain its historical development. ![]() He called these small pieces of matter " atomos," the Greek word for indivisible. Democritus believed that atoms were uniform, solid, hard, incompressible, and indestructible and that they moved in infinite numbers through empty space until stopped. Describe the contributions of Democritus and Dalton to atomic theory. Democritus knew that if a stone was divided in half, the two halves would have essentially the same properties as the whole.Therefore, he reasoned that if the stone were to be continually cut into smaller and smaller pieces then at some point, there would be a piece which would be so small as to be indivisible. Therefore, he was given the title of father of modern science. The research he did on atoms makes him more likely a scientist than a philosopher. Democritus is recognized as the earliest proponent of the concept of atomism. He elaborated a system originated by his teacher Leucippus into a materialist account of the natural world. He was an influential pre-Socratic philosopher and pupil of Leucippus, who formulated an atomic theory for the cosmos. Democritus, known in antiquity as the ‘laughing philosopher’ because of his emphasis on the value of ‘cheerfulness,’ was one of the two founders of ancient atomist theory. ![]() ![]() He is a very famous Greek philosopher due to the discovery of the atomic theory. Democritus’ Life and Contribution Ancient Greek philosopher born in Abdera, Thrace, Greece. One of the first atomic theorists was Democritus, a Greek philosopher who lived in the fifth century BC. Democritus is a well-known pre-Socratic Greek philosopher who came before Socrates. In this lesson, we will review the development of the atomic theory. Atomic Structure, Periodicity, and Matter: Development of the Atomic Theory He was the first to theorize that if you keep cutting stuff down smaller and smaller, you will eventually reach the smallest piece possible. ![]()
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