Dalton’s Atomic Theory. Law of Conservation of Mass The total mass of materials after a chemical reaction is the same as the total mass before the reaction.

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Presentation transcript:

Dalton’s Atomic Theory

Law of Conservation of Mass The total mass of materials after a chemical reaction is the same as the total mass before the reaction.

Law of Constant Composition The elemental composition of a compound is always the same

Law of Multiple Proportions If two elements A and B combine to form more than one compound, the masses of B that combine with a given mass of A are n the ratio of small whole numbers.

Dalton’s Atomic Theory 1. Each element is composed of extremely small particles called atoms.

2. All atoms of a given element are identical, but the atoms of one element are different from the atoms of all other elements.

3. Atoms of one element cannot be changed into atoms of a different element by chemical reactions. – Atoms are neither created nor destroyed in chemical reactions.

4. Compounds are formed when atoms of more than one element combine. – A given compound always has the same relative number and kind of atoms.

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