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Question

Age of fossil may be found out by determining the ratio of two isotopes of Carbon. The isotopes are ________.

A
C12 and C13
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B
C13 and C14
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C
C12 and C14
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D
C12 and carbon black
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Solution

The correct option is B C12 and C14

Age of fossil may be found out by determining the ratio of two isotopes of Carbon. The isotopes are C−12 and C−14.

Carbon-14, 14C, or radiocarbon, is a radioactive isotope of carbon with an atomic nucleus containing 6 protons and 8 neutrons. Its presence in organic materials is the basis of the radiocarbon dating method pioneered by Willard Libby and colleagues (1949) to date archaeological, geological and hydrogeological samples.

The most common of these is carbon 12, 13, 14. All of these isotopes have the same atomic number but different mass numbers. ... Carbon-12 has 6 neutrons, carbon-13 has 7 neutrons, and carbon-14 contains 8 neutrons. Carbon-12 and 13 are stable isotopes, which means that the nucleus does not undergo radioactive decay.


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