However, oxygen we encounter in our daily lives is usually found as a diatomic molecule, meaning it exists as two oxygen atoms bonded together. This is represented by the chemical formula O₂.

Here's a breakdown:

* Atom: The smallest unit of an element that retains the chemical properties of that element.

* Molecule: Two or more atoms held together by chemical bonds.

* Diatomic molecule: A molecule consisting of two atoms of the same element.

So, while oxygen is made up of oxygen atoms, it usually exists as O₂ molecules.