What does the term “half-life” refer to?     The time necessary for all daughter elements to decay in to parent elements     The time necessary for all parent elements to decay in to daughter elements     The time necessary for half of daughter elements to decay in to parent elements     The time necessary for half of parent elements to decay in to daughter elements

Chemistry by OpenStax (2015-05-04)
1st Edition
ISBN:9781938168390
Author:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Publisher:Klaus Theopold, Richard H Langley, Paul Flowers, William R. Robinson, Mark Blaser
Chapter12: Kinetics
Section: Chapter Questions
Problem 46E: Fluorine-18 is a radioactive isotope that decays by positron emission to form oxygen-18 with a...
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  1. What does the term “half-life” refer to?

       

    The time necessary for all daughter elements to decay in to parent elements

       

    The time necessary for all parent elements to decay in to daughter elements

       

    The time necessary for half of daughter elements to decay in to parent elements

       

    The time necessary for half of parent elements to decay in to daughter elements

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