The Dalton Atom Model is the model in which John Dalton laid the foundations of today's atomic model in 1805. Folded rates have found the law. According to Dalton's atomic theory, the elements contain chemically identical atoms. The atoms of different elements are different from each other. According to this atomic theory, a chemical compound is formed by a simple ratio of two or more elements. Based on the mass relations between substances involved in chemical reactions, Dalton also found bound masses of atoms. Modern atomic theory is based on Dalton's theory; but some parts have been changed. We know that the atom is disintegrating, the elements are composed of a mixture of isotopes and not the same atoms. Dalton's atomic theory has greatly benefited the explanation of chemical reactions, understanding the substance and introducing the basic properties of the atom. For this reason, it is considered as the first scientific atomic theory.

Dalton's concept of atom is based on three assumptions; The elements are composed of small, non-dividing particles called atoms. Atoms do not occur in chemical reactions and do not divide. The mass and the other characteristics of all the atoms of an element are the same, different from the atoms of other elements. A chemical compound is formed by a simple ratio of two or more elements.

Dalton's atomic theory provides a better definition of chemical change:

The law of conservation of mass: The sum of the masses of substances that react in a chemical reaction is equal to the sum of the masses of the substances (products).
The law of folded rates: If the two elements form more than one compound, there is a simple ratio between the different amounts of the two joining elements, which can be expressed in whole numbers by weight. For example: H2O combines 2 g of hydrogen with 16 g of oxygen, while OH with 1 g of hydrogen and 16 g of oxygen are combined. 2 g of hydrogen and 1 g of hydrogen are combined with the same amount of oxygen in both compounds to give 2.

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