An isotope is the same element with a different number of
A) protons.
B) neutrons.
C) electrons.
D) electrons and protons.
E) protons and neutrons.
Correct Answer:
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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
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
Q32: Which of the following radioactive isotopes is
Q33: Uranium-238 after many decay events becomes this
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