Question

Carbon has an average atomic mass of 12.01g/mol. Which of its isotopes would be the most common in nature (largest % of carbon)?

a) C-13
b) C-14
c) They are the same
d) C-12

Answer 1

Carbon-12 (C-12) is the most common isotope of carbon in nature, making up about 98.89% of naturally-occurring carbon.

Step-by-step explanation:

Carbon-12 (C-12) would be the most common isotope of carbon in nature. The average atomic mass of carbon is 12.01 g/mol, but the majority of carbon atoms have a mass number of 12. C-12 makes up about 98.89% of naturally-occurring carbon, while C-13 is present in only about 1.11%.