25 фев 1801 г. - John Dalton
Описание:
His theory specified that atoms of a given element are identical, atoms cannot subdivided, created or destroyed.
"Law of constant compositon" - in a given compound the relative number and type of atoms is constant
"Law of conversation of mass" - Matter cannot be created or destoryed
Law of multiple proportions" -when chemical elements combine, they do so in small, whole number ratios.
He combined different gases and observed their properties regarding their density and pressure.
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