History of Atomic Structure

History of Atomic Structure - Click to edit Master subtitle...

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Unformatted text preview: Click to edit Master subtitle style 10/5/09 History of Atomic Structure 400 BC 1 7 9 9 1 8 9 6 1 8 9 8 1 9 5 1 9 1 1 1 9 4 10/5/09 Democritus 400 BCE Greek philosopher that was first to discuss atomism and to use the word atom, which means unbreakable. He claimed that all matter Democritus model was based on no evidence. It was a solid indivisible sphere. 10/5/09 Aristotle 4th Century BCE Stated that there were four elements (air, earth, water, fire) and that 10/5/09 Antoine Lavoisier 1777 Lavoisier conducted experiments concerning thermodynamics and combustion. Through his experiments, he weighed the reactants and During a chemical reaction, there is no gain 10/5/09 Joseph Louis Proust 1799 Proust conducted his experiments and All pure samples of the same compound contain the same elements combined together in the same proportions by 10/5/09 John Dalton 1803 Dalton proposed the Atomic Theory which listed that matter is made up of tiny particles called...
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