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John Dalton (!766-1844) revised Democritus' ideas on atoms based on his own personal research. Revived the term "atom"
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Competley disagreed with Democritus that atoms move through empty space. Aristotle (384-322) disagreed with the existance of atoms due to his views on nature.
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Theorized that atoms were the tiny particles that made up matter and floated through empty space. Demotricus (460-370) was the first person to determine matter couldn't be infintley divided.