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题目
题目

ESS 101 A Examination 2 (Friday December 5th 7:00 - 8:30 PM PST)

多项选择题

Which of the following statements is/are true regarding and radioactive isotope's half-life? (there are three correct answers)

选项
A.It represents the time it takes one half of the existing parent atoms to decay to daughter atoms
B.It is mathematically related to the isotope's radioactive decay constant
C.isotopes with large half-lives cannot be used to date young (<300,000 years old) lava flows
D.It represents a process where a radioactive isotope will decay to a single radiogenic daughter atom
E.It represents a process where the radioactive isotope can decay to more than one radiogenic daughter atom
F.It represents the process where the radioactive isotope can decay to more than one radiogenic daughter atom
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查看解析

标准答案
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思路分析
Delving into the concept of radioactive half-life, we need to assess each statement on its own terms before drawing any conclusions about which are true. Option 1: 'It represents the time it takes one half of the existing parent atoms to decay to daughter atoms.' This is the classic, widely accepted definition of half-life. It quantifies how long it takes for 50% of a given sample of parent nuclei to transform into their daughter products. The idea hinges on statistical decay, not on a specific molecule or event, and it applies consistently across many isotopes. Option 2: 'It is mathematically related to the isotope's radioactive decay constant.' This statement is accurate. The ......Login to view full explanation

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