Democritus (470-380 B.C.)
first guy, Name comes from "atomos"
Means "something that cannot be divided", little ball of matter that could not be cut up into smaller pieces
solid, with no internal structure
Aristotle (384-322 B.C.)
the Parliament of Paris (by decree in 1624) and the Catholic Church
In 1808 stated a five-point theory/model about atoms in a textbook called A New System of Chemical Philosophy
Robert Boyle, Antoine Lavoisier and Joseph Proust
experimental observations available at the time, not just philosophical thought
based on later experimental data
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