ancient+and+years+prior)

Democritus Democritus theorized that only 2 things existed, atoms and space. His theory called atoms a small indivisible particle that made up all things by different combinations and these atoms moved around in empty space. Atoms were infinite in number and space was infinite in size. He also theorized that these atoms were neither created or destroyed and never could be, thus implying conservation of mass. Democritus was also a philosopher who did not believe in the Greek gods and preached uprightness and cheerfulness. [|http://www.bookrags.com/biography/democritus/#] []

Aristotle The ancient Greek philosopher believed that all things were made from matter and form. Matter made up the substance and form made it what it was. He believed there was 5 types of matter earth air water fire and ether (what made up the heavens and stars). Aristotle rejected Democritus’ belief in the atom. Aristotle lived from 384 to 322 bc. He was a wise philosopher who was hired to teach Alexander the Great, and created the lyceum in Athens. [] []

Leucippus Leucippus along with Democritus are recognized for being the creator of atomic theory and the first to believe that atoms make up everything. Leucippus’ theory was that every thing was made up by the full and the void and the combination determined the properties of a substance. He also believed that all change was, was a change in appearance, and no real change happened at the atomic level.

Losi.Mcneil.Atomic.Historytimeline.fall.2009