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  1. en.wikipedia.org › wiki › Half-lifeHalf-life - Wikipedia

    In a chemical reaction, the half-life of a species is the time it takes for the concentration of that substance to fall to half of its initial value. In a first-order reaction the half-life of the reactant is ln (2)/λ, where λ (also denoted as k) is the reaction rate constant.

  2. chem.libretexts.org › Bookshelves › Physical_and_Theoretical_Chemistry_Textbook2.4: Half-lives - Chemistry LibreTexts

    It is important to note that the half-life is varied between different type of reactions. The following section will go over different type of reaction, as well as how its half-life reaction are derived. The last section will talk about the application of half-life in the elimination phase of pharmacokinetics.

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    • Gordon Freeman - Half-Life 2 [4] wallpaper - Game wallpapers - #23285
    • How to Calculate Half Life: 6 Steps (with Pictures) - wikiHow
    • Half-lives and Radioactive Decay [MOE]
    • Half-Lives and Radioactive Decay Kinetics

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  4. www.britannica.com › science › half-life-radioactivityHalf-life | Definition & Facts | Britannica

    Learn about half-life, the time it takes for half of a radioactive sample to decay, and how it varies for different types of decay. Also, explore nuclear reaction, the change in the identity or characteristics of an atomic nucleus by bombarding it with an energetic particle.

  5. chem.libretexts.org › Courses › Furman_University5.7: Calculating Half-Life - Chemistry LibreTexts

    26 Jun 2023 · Learning Objectives. Describe what is meant by the term half-life and what factors affect half-life. Calculate the amount of radioactive material that will remain after an integral number of half-lives. Calculate the age of a material based upon its half-life.

  6. chem.libretexts.org › Nuclear_Kinetics › Half-Lives_and_Radioactive_Decay_KineticsHalf-Lives and Radioactive Decay Kinetics - Chemistry LibreTexts

    30 Jan 2023 · This plot shows the concentration of the reactant in a first-order reaction as a function of time and identifies a series of half-lives, intervals in which the reactant concentration decreases by a factor of 2. In a first-order reaction, every half-life is the same length of time.

  7. chem.libretexts.org › Bookshelves › Physical_and_Theoretical_Chemistry_Textbook11.8: The Method of Half-Lives - Chemistry LibreTexts

    16 Jan 2023 · The half-life can be defined as the time it takes for the concentration of a reactant to fall to half of its original value. The method of half-lives involved measuring the half-life’s dependence on concentration.

  8. www.khanacademy.org › atomic-nucleus › aDecay graphs and half lives article (article) | Khan Academy

    Most living things contain carbon-14, an unstable isotope of carbon that has a half-life of around 5,000 years. That means that when scientists dig up fossil bones, they can figure out how old they are by measuring the amount of carbon-14 remaining in the bones.

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