Matter Leucippus’ theory

To Leucippus and Democritus the Greeks and the Western world are indebted for the first clearly defined atomic theory of matter. Leucippus was the teacher of Democritus,... 

While many civilizations learned how to make dyes and pigments, or ferment fruit into wine, the earliest theories about atoms and what makes up the chemical world came from ancient Greece and India. Leucippus in Greece and Kanada in India both came up with the idea that there must be a small, indivisible part of matter. The Greek word for uncuttable is atomos, clearly the root of the modern term atom. Kanada s term for this similar concept was paramanu or simply anu, the indivisible element of matter. 

The Atomic Theory Democritus and Leucippus, ancient Greek philosophers, were the first to assert that matter is ultimately composed of small, indestructible particles. It was not until 2000 years later, however, that John Dalton introduced a formal atomic theory stating that matter is composed of atoms atoms of a given element have unique properties that distinguish them from atoms of ofher elements and atoms combine in simple, whole-number ratios to form compounds. The Atomic Theory The concept of atoms is important because it explains the physical world. You and everything you see are made of atoms. To understand the physical world, we must begin by understanding atoms. Atoms are the key concept—they determine the properties of matter. 

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