Question

the atomic mass unit is defined as:
the mass of the hydrogen atom containing only one proton.
1/14 the mass of a nitrogen atom containing 7 protons and 7 neutrons.
1/12 the mass of a carbon atom containing six protons and six neutrons.
the mass of electrons found in a carbon atom containing six protons and neutrons.

Explanation:

The atomic mass unit (amu) is defined as \( \frac{1}{12} \) the mass of a carbon - 12 atom. A carbon - 12 atom has 6 protons and 6 neutrons.

Answer:

1/12 the mass of a carbon atom containing six protons and six neutrons.