Question

There are three isotopes of carbon. They have mass number of 12, 13 and
14. The average atomic mass of carbon is 12.0107 amu. What does this say
about the relative abundances of the three isotopes?

Answer 1

Answer:

The relative atomic mass of carbon is 12.011, which is extremely close to 12.0. This means that the masses C-13, and C-14 are practically negligible when contributing to the relative atomic mass of carbon.

In fact, the C-12 isotope makes up 98.9% of carbon atoms, C-13 makes up 1.1% of carbon atoms, and C-14 makes up just a trace of carbon atoms as they are found in nature.

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