John Dalton 1803
Dalton's Nationality: English
John Dalton was the first to piece together the Atomic Theory into five basic assumptions in 1803. He pulled ideas from certain scientists to help him form the Atomic Theory. For example, John Dalton pulled Antoine Lavoisie’s Law of Conservation of Mass to describe that atoms cannot be destroyed, divided into smaller pieces, created, or transformed into atoms of another element. Dalton’s Atomic Theory:
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Atomic Model
John Dalton's atomic model is still just a round sphere with no electrons, protons, or nuetrons.