Half-Life Definition

Chemistry Glossary Definition of Half-Life

illustration of hand reaching for radioactive symbol
An element's half-life is one way to gauge its radioactivity. fStop Images/Jutta Kuss,/Getty Images

Half-Life Definition:

The time required to convert one half of a reactant to product. The term is commonly applied to radioactive decay, where the reactant is the parent isotope and the product is a daughter isotope.

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Helmenstine, Anne Marie, Ph.D. "Half-Life Definition." ThoughtCo, Feb. 9, 2017, thoughtco.com/definition-of-half-life-604523. Helmenstine, Anne Marie, Ph.D. (2017, February 9). Half-Life Definition. Retrieved from https://www.thoughtco.com/definition-of-half-life-604523 Helmenstine, Anne Marie, Ph.D. "Half-Life Definition." ThoughtCo. https://www.thoughtco.com/definition-of-half-life-604523 (accessed January 22, 2018).