Question 1 • Chemistry Honors 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, the number of protons in each nitrogen atom. Its mass number of 14 is the total number of protons and neutrons. The periodic table lists nitrogen’s atomic mass as about 14.01 amu, a weighted average of its isotopes and close to the combined mass of the protons and neutrons in N-14.