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.
14C and 14N have the same:
a. Atomic number
b. Number of protons
c. Mass number
d. Number of neutrons
e. Number of electrons
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