Final answer:
Oxygen gas (O₂) is a non-electrolyte because it does not ionize or dissociate into ions in solution, unlike strong or weak acids and bases.
Step-by-step explanation:
O2 (oxygen gas) is neither an acid nor a base. It is a diatomic molecule that consists of two oxygen atoms. When assessing the classification of compounds as strong acids, weak acids, strong bases, weak bases, or none of these, we refer to their properties and behavior in solutions. Strong acids and bases are those that ionize or dissociate completely in water, while weak acids and bases only partially ionize.
Oxygen gas does not fall into any of these categories as it does not release hydrogen ions (H+) in solution to behave as an acid, nor does it release hydroxide ions (OH-) to behave as a base. As such, the most appropriate classification for O2 with regard to the provided options would be a non-electrolyte, since it does not produce ions in solution.