5 ottob 1803 anni - John Dalton

Descrizione:

Date: 1803-1808

Country: Britain

Observations/Experiments/Evidence: Used the Law of Conservation of Mass (Lavoisier, 1789), Law of Constant Composition (Proust, 1799), and Law of Multiple Proportions (Dalton) as evidence for his discoveries.

Discoveries/Conclusions: John Dalton said that matter is composed of atoms, all atoms of one element are the same as each other, and that when a chemical reaction occurs the rearrangement of atoms are in simple whole number ratios.

Contribution: John Dalton’s law of multiple proportions and his observations lead to a much greater understanding of what atoms are.

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