Question

Which isotope is more likely to bond with oxygen, C-12 or C-14?

Answer 1

The `""^12C` isotope. Why?

Explanation:

So why is the `""^12C` isotope more likely to bind? Simply because the `""^12C` isotope is far more abundant, `"approx. " 99%`. There would exist both `""^13CO_2` and `""^14CO_2` in the atmosphere, but their abundance would reflect the isotopic distribution.