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    Exam 8: Clocks in Rocks: Timing the Geologic Period
  5. Question
    The Half-Life of a Radioactive Isotope Is
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The Half-Life of a Radioactive Isotope Is

Question 68

Question 68

Multiple Choice

The half-life of a radioactive isotope is


A) half the time it takes all the radioactive atoms to decay.
B) the time it takes for half of the radioactive atoms to decay.
C) half of the radioactive atom's "full-life."
D) the average life-span of a stable atom.

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