Question 1 • IA-Chemistry A Survey of Chemistry A
Correct Answer:
A neutral nitrogen-14 atom has 7 protons and 7 neutrons in its nucleus and 7 electrons in orbitals around the nucleus. Nitrogen’s atomic number is 7, which equals its number of protons. Its mass number is 14, the total number of protons and neutrons (7 + 7), and its average atomic mass on the periodic table is about 14.01 atomic mass units, based mainly on the mass of its protons and neutrons.