A radioactive isotope is
A) a pair of identical molecules.
B) two molecules with the same tonicity.
C) an element with an unstable nucleus that decays to a more stable form.
D) an element that generates electrons.
Correct Answer:
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Q21: Which CANNOT be accurately dated using radiometric
Q22: Which element has the longest half-life?
A) rubidium-87
B)
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
Q27: Which ratio is NOT analyzed for radiometric
Q28: An isotope is the same element with
Q29: How old is Earth?
A) 1-2 million years
Q30: Uranium-238 has a half-life of 4.5 billion
Q31: All of the following are TRUE of
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