# Problem: Scientists use carbon dating to determine the age of fossils. 14C is a rare isotope of carbon that has a half life of 5730 years and decays into 14N. By measuring the amount of 14C remaining in a fossil, scientists can estimate when the organism died out to about 60,000 years. The atomic number of C is 6, and of N is 7.If a fossil has only 25% of its 14C remaining, how old is it? a. 5,730 yearsb. 2,865 yearsc. 1,432.5 yearsd. 22,920 yearse. 11,460 years

###### Problem Details

Scientists use carbon dating to determine the age of fossils. 14C is a rare isotope of carbon that has a half life of 5730 years and decays into 14N. By measuring the amount of 14C remaining in a fossil, scientists can estimate when the organism died out to about 60,000 years. The atomic number of C is 6, and of N is 7.

If a fossil has only 25% of its 14C remaining, how old is it?

a. 5,730 years

b. 2,865 years

c. 1,432.5 years

d. 22,920 years

e. 11,460 years

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Our tutors have indicated that to solve this problem you will need to apply the Isotopes concept. You can view video lessons to learn Isotopes. Or if you need more Isotopes practice, you can also practice Isotopes practice problems.

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