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Actually the Greek time period was around 300BC and after Greek ideas of atomsT
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What Democritus and the Greeks thought an atom looked like
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This is a general idea of what the Greeks thought.
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This image contains the basic ideas of what Dalton and some of the first scientists thought about atoms. http://www.iun.edu/~cpanhd/C101webnotes/composition/dalton.html
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Dalton proposed an spherical solid atoms . He based his ideas upon the measurable properties of mass. History of the Atomic Model
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This image captures what Dalton thought the atom looked like.