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- https://chem.libretexts.org/Courses/Portland_Community_College/CH100%3A_Everyday_Chemistry/02%3A_Chemical_Reactions/2.1%3A_The_Atomic_Theory_of_MatterThis article explains the theories that Dalton used as a basis for his theory: (1) the Law of Conservation of Mass, (2) the Law of Constant Composition, (3) the Law of Multiple Proportions.
- https://chem.libretexts.org/Courses/Williams_School/Chemistry_I/02%3A_Atoms_Molecules_and_Ions/2.05%3A_Early_Ideas_in_Atomic_TheoryThe ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms ...The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds. Samples of a particular compound all have the same elemental proportions by mass.
- https://chem.libretexts.org/Workbench/OpenStax_Chemistry_Remixed%3A_Clovis_Community_College/02%3A_Atoms_Molecules_and_Ions/2.02%3A_Early_Ideas_in_Atomic_TheoryThe ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms ...The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds. Samples of a particular compound all have the same elemental proportions by mass.
- https://chem.libretexts.org/Courses/Widener_University/Chem_145%3A_General_Chemistry_I_(van_Bramer)/02%3A_Atoms_Molecules_and_Ions/2.02%3A_Early_Ideas_in_Atomic_TheoryThe ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms ...The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds. Samples of a particular compound all have the same elemental proportions by mass.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/General_Chemistry_Supplement_(Eames)/Chemistry_Basics/Atomic_TheoryProust was more careful to study only pure compounds, and knew how precise his measurements were, so that even though the exact numbers didn't always come out the same, once he rounded to the correct ...Proust was more careful to study only pure compounds, and knew how precise his measurements were, so that even though the exact numbers didn't always come out the same, once he rounded to the correct number of significant figures, the ratios were the same, no matter how the material was prepared.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/04%3A_Atomic_Structure/4.05%3A_Mass_Ratio_CalculationThis page explains the law of multiple proportions in chemistry, illustrating it with examples of copper and chlorine compounds that have different copper-to-chlorine mass ratios. It details the calcu...This page explains the law of multiple proportions in chemistry, illustrating it with examples of copper and chlorine compounds that have different copper-to-chlorine mass ratios. It details the calculations for comparing copper quantities that combine with a fixed mass of chlorine, emphasizing the significance of these ratios in understanding compound composition and encouraging further exploration of mass ratios and molecular formulas.
- https://chem.libretexts.org/Bookshelves/Physical_and_Theoretical_Chemistry_Textbook_Maps/Supplemental_Modules_(Physical_and_Theoretical_Chemistry)/Atomic_Theory/Dalton's_Atomic_Theory/Law_of_Multiple_ProportionsJohn Dalton (1803) stated, "'When two elements combine with each other to form two or more compounds, the ratios of the masses of one element that combines with the fixed mass of the other are simple ...John Dalton (1803) stated, "'When two elements combine with each other to form two or more compounds, the ratios of the masses of one element that combines with the fixed mass of the other are simple whole numbers'.
- https://chem.libretexts.org/Courses/Los_Angeles_Trade_Technical_College/Chem_51/04%3A_Atoms_Molecules_and_Ions/4.02%3A_Early_Ideas_in_Atomic_TheoryThe ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms ...The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds. Samples of a particular compound all have the same elemental proportions by mass.
- https://chem.libretexts.org/Courses/Widener_University/CHEM_145%3A_FA22_Van_Bramer/02%3A_Atoms_Molecules_and_Ions/2.02%3A_Early_Ideas_in_Atomic_TheoryThe ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms ...The ancient Greeks proposed that matter consists of extremely small particles called atoms. Dalton postulated that each element has a characteristic type of atom that differs in properties from atoms of all other elements, and that atoms of different elements can combine in fixed, small, whole-number ratios to form compounds. Samples of a particular compound all have the same elemental proportions by mass.
- https://chem.libretexts.org/Bookshelves/General_Chemistry/Map%3A_Chemistry_-_The_Central_Science_(Brown_et_al.)/02%3A_Atoms_Molecules_and_Ions/2.01%3A_The_Atomic_Theory_of_MatterThis article explains the theories that Dalton used as a basis for his theory: (1) the Law of Conservation of Mass, (2) the Law of Constant Composition, (3) the Law of Multiple Proportions.
- https://chem.libretexts.org/Courses/Howard_University/General_Chemistry%3A_An_Atoms_First_Approach/Unit_1%3A__Atomic_Structure/Chapter_1%3A_Introduction/Chapter_1.4%3A_A_Brief_History_of_ChemistryThis page outlines a general chemistry course focusing on atomic theory, molecular structure, stoichiometry, thermochemistry, states of matter, kinetics, equilibria, and materials. It highlights the d...This page outlines a general chemistry course focusing on atomic theory, molecular structure, stoichiometry, thermochemistry, states of matter, kinetics, equilibria, and materials. It highlights the development of atomic theory from ancient Greek thought to modern science, discussing key figures like Democritus, Robert Boyle, Joseph Priestley, and Antoine Lavoisier. It explains fundamental chemical laws, Dalton's atomic theory, Avogadro's hypothesis, and the law of multiple proportions.
