Which element has the longest half-life?
A) rubidium-87
B) lead-214
C) uranium-238
D) carbon-14
E) potassium-40
Correct Answer:
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Q17: Which molecules have not been synthesized from
Q18: An animal with a rigid backbone would
Q19: The evolutionary history of an organism is
Q20: Which of these would be used to
Q21: Which CANNOT be accurately dated using radiometric
Q23: The half-life of carbon-14 is _ years.
A)
Q24: Which element has the shortest half-life?
A) rubidium-87
B)
Q25: On the tree below,which number represents the
Q26: A radioactive isotope is
A) a pair of
Q27: Which ratio is NOT analyzed for radiometric
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