What is Oxygen? September 7, 2021 What is Oxygen? Oxygen is a chemical element, its symbol is O and its atomic number is 8. The viscosity of oxygen is usually 2. This element is usually formed by covalent or ionic bonds with other elements. Examples of Continue reading → Continue reading... chemical properties of oxygen, oxygen gas formula, oxygen o2, physical properties of oxygen, properties of oxygen, what is oxygen cycle, what is oxygen used for, where is oxygen found Oxygen Cylinder