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John Dalton 1808
John Dalton 1808
John Dalton was a British school teacher and is known as the Father of Modern Atomic Theory. He came up with five statements to describe the properties of matter. These statements were supported by three scientifically proven Laws.
Law of Conservation of Mass
Law of Conservation of Mass
Antoine LavoisierIn an isolated system, mass can neither be created nor destroyed during chemical reactions or physical transformations.
Law of Definite Proportions
Law of Definite Proportions
Joseph ProustA chemical compound always contains exactly the same proportion of elements by mass, regardless of the size or source of the sample.
Law of Multiple Proportions
Law of Multiple Proportions
John DaltonWhen two elements combine with each other to form more than one compound, the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.
Dalton's Atomic Theory
Dalton's Atomic Theory
1. Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed.
1. Everything is composed of atoms, which are the indivisible building blocks of matter and cannot be destroyed.
2. All atoms of a given element are identical.
2. All atoms of a given element are identical.
3. The atoms of different elements vary in size and mass.
3. The atoms of different elements vary in size and mass.
4. Compounds are produced through different whole-number combinations of atoms.
4. Compounds are produced through different whole-number combinations of atoms.
5. A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.
5. A chemical reaction results in the rearrangement of atoms in the reactant and product compounds.
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