An atom of oxygen contains eight neutrons. A neutron is one of the particles that make up matter, which is any substance that takes up space. Neutrons are fundamental particles, meaning that they cannot be broken down.
Neutrons make up more than half of all visible matter in the universe. They are used to determine the structure of materials used in industries such as mining, engineering and food processing. Neutrons are used to locate specific atoms, differentiate between light and heavy atoms, and detect molecular vibrations of atoms during catalytic reactions. These properties are critical in the determination of accurate molecular structures.