Oxygen has 8 neutrons, 8 electrons and 8 protons, making it a neutral element. Neutral elements have the same number of neutrons and protons. Oxygen is the eighth element in the periodic table of elements, with an atomic number of 8.
The atomic number represents the number of protons in the nucleus. The periodic table also states that oxygen has an atomic weight of 16. It's possible to calculate the number of neutrons in an element by subtracting the atomic number from the atomic weight. While the number of electrons equals the number of protons, the weight of electrons is negligible when compared to that of neutrons and protons.