It is a chemical process - an oxidation.
This is a chemical property.
Combustibility is a chemical property.
It is a chemical property as air sensitive compounds react with oxygen or air to yield a different compound. Physical properties don't alter the composition of the compound but rather the behaviour through different molecular arrangement.
Ability to react with oxygen in the air is a chemical property.
chemical
It is a chemical property.
This is a chemical property. The reaction of green carbonate with moist air to form a different substance involves a change in the chemical composition of the substance, indicating a chemical reaction.
Air is a noun and not and adjective, hence it can not be a property. Gas would be a physical property describing air. Inert (for example) would be a chemical property.
Chemical property
Reacting to air is a chemical property because it involves a change in the chemical composition of the substance when it comes into contact with oxygen in the air, leading to the formation of new compounds. It reflects how a substance interacts with its environment on a molecular level.
Thickness is a physical property without any relation with chemical composition or chemical changes.
The combustion of magnesium in air is a chemical reaction.