What is o17?

O17 refers to the isotopes of oxygen that contain 8 protons and 9 neutrons in their nuclei. These isotopes are less common than the most common isotope of oxygen, O16, which has 8 protons and 8 neutrons. O17 makes up about 0.04% of natural oxygen on Earth. It is used in many scientific fields, including geology and atmospheric science, as a tracer of processes such as oxygen exchange between the atmosphere and oceans. O17 is also used in the medical field as a tracer for the study of metabolism in the brain and other organs.