Question

Carbon has six protons and six neutrons in its nucleus. What is the atomic mass of carbon?

• A. 4
• B. 12
• C. 8
• D. 6

Answer 1

The correct option is B 12

The atomic mass of carbon is $12$. The mass of an atom is given by the sum of the masses of protons and neutrons present in the nucleus. Since, the number of protons and neutrons present in carbon is $6$.
Therefore, the atomic mass of carbon is $12$ i.e. $6+6=12$.