What is the chemical symbol for oxygen?
The chemical symbol for oxygen is O, and it is frequently written as O2. This is because when oxygen is not chemically combined with anything else, it hangs around with a buddy. Oxygen is said to be a diatomic molecule, and that's how we encounter it in air. It is a member of the chalcogengroup on the periodic table and is a highly reactivenonmetallic element and oxidizing agent that readily formscompounds (notably oxides) with most elements.