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Period: 460 BCE to 370 BCE
Democritus
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442 BCE
Democritus Model
Democritus’s model, consisted that matter was formed by invisible particles called atoms. He said that atoms are indestructible and unchangeable. Also that they are homogenous, meaning they have no internal structure. His atomic model was solid, and stated all atoms differ in size, shape, mass, position and arrangement. However, this was wrong due to the worng idea of a solid particle. -
Period: to
John Dalton
