Why is oxygen a gas?

Answer 1

Oxygen forms a stable diatomic molecule. The intermolecular forces are insufficient to raise the boiling point above normal temperature so it is a gas.

Answer 2

Oxygen is a gas at room temperature and pressure because its molecules are not held tightly together and are able to move around freely. The weak intermolecular forces between oxygen molecules allow them to escape their fixed positions and move independently, resulting in a gas state.

Answer 3

An elements properties are determined by its electron structure. Oxygen has an electron structure that makes it a nonmetal and a gas.

Answer 4

Yes.