Which quantity helps determine the absolute age of rocks and fossils?
A. The ratio of carbon -12 to carbon -14
B. The difference between the amounts of carbon -12 and carbon -14.
C. The ratio of protons to neutrons in carbon -14.
D. The difference between the number of protons and neutrons in carbon -14.
1 answer
C. The ratio of protons to neutrons in carbon-14.
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