* At room temperature and pressure, oxygen is a gas. This is the form we breathe and is the most common form on Earth.
* At very low temperatures (below -183°C or -297°F), oxygen becomes a liquid. This is how oxygen is stored and transported for industrial use.
* At even lower temperatures (below -218°C or -360°F), oxygen becomes a solid. This solid form is a pale blue color.
So, to answer your question, oxygen is typically a gas at room temperature, but it can also exist as a liquid or solid depending on the conditions.
