(c) McGraw Hill Ryerson 2007 1.3 Atomic Theory Early ideas about matter The Greek philosopher Democritus believed that matter was made of atomos that were.
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2.3 Atomic Theories. Greeks (5 th Century B.C.) – coined the term “atoms” to describe invisible particles of which substances were composed Aristotle.
Properties of Atoms and the Periodic Table. Atoms Unit of all matter, building blocks of elements Smallest piece of matter that has the properties of.