Around 440 BC leucippus of Miletus originated the atom concept. He and his pupil, Democritus of abdera refined it for future use. Their atomic idea has five major points. All original writings of leucippus and Democritus are lost. The only sources we have for there atomistic ideas are inquotations from other writers. Democritus was known as the "laughing philosopher" because he enjoyed life so much. At this time Greek philosophy was about 150 years old, emerging in the sixth century bc, centered in the city of miletus on the ionian coast in Asia minor, which is now turkey. The work of leucippus and Democritus was further developed by epicures (341-270 BC) of Samos. He made ideas more generally known. Aristotle also quotes both of them in arguing against their ideas. Most of what we know about leucippus and Democritus was found in a poem entitled "de rerum natura" (on the nature of things) written by Lucretius (95-55 BC). This poem was lost for over a thousand years and was discovered in 1417.

These are the basic points of their theory.

#1 - all matter is composed of atoms, which are bits of matter to small to be seen. These cannot be split any smaller. " The atomists hold that spli

http://dbhs.wvusd.k12.ca.us The Greek Concept Of Atomos John L. Park 1996

G. Raymer-Cantham, Chemistry addison-wesley publishers

" Democritus and leuccippus say thatthere are indivisible bodies, infinite number and shape" Aristotle

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