Law of Multiple Proportions Definition - Chemistry Glossary

Sample being pipetted into test tubes during a laboratory experiment
Westend61 / Getty Images

The Law of Multiple Proportions states that when elements combine, they do so in the ratio of small whole numbers (assuming they have the same type of chemical bonds).

Also Known As: Dalton's Law, though that term usually refers to his law of partial pressure

Examples: carbon and oxygen react to form CO or CO2, but not CO1.6

Format
mla apa chicago
Your Citation
Helmenstine, Anne Marie, Ph.D. "Law of Multiple Proportions Definition - Chemistry Glossary." ThoughtCo, Aug. 28, 2020, thoughtco.com/definition-of-law-of-multiple-proportions-605889. Helmenstine, Anne Marie, Ph.D. (2020, August 28). Law of Multiple Proportions Definition - Chemistry Glossary. Retrieved from https://www.thoughtco.com/definition-of-law-of-multiple-proportions-605889 Helmenstine, Anne Marie, Ph.D. "Law of Multiple Proportions Definition - Chemistry Glossary." ThoughtCo. https://www.thoughtco.com/definition-of-law-of-multiple-proportions-605889 (accessed January 28, 2021).