An atom with 7 protons, 7 neutrons, and 8 electrons is a nitrogen atom because the number of protons (7) defines the element as nitrogen. The mass number of this atom is the sum of protons and neutrons, which is 7+7=147+7=147+7=14 atomic mass units (amu)
. The electrons have negligible mass compared to protons and neutrons, so they do not significantly affect the mass of the atom
. Therefore, the mass of this atom is approximately 14 amu.
