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    Exam 8: Geologic Time
  5. Question
    Which of the Following Does Not Have at Least One
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Which of the Following Does Not Have at Least One

Question 124

Question 124

Multiple Choice

Which of the following does not have at least one, very long-lived, natural, radioactive isotope?


A) Th; thorium
B) Ca; calcium
C) Rb; rubidium
D) K, potassium

Correct Answer:

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