Physical Properties of Gases:

1. Volume: Gases fill the entire container they are placed in.
2. Shape: Gases take the shape of the container they are in.
3. Density: Gases have low density compared to liquids and solids.
4. Compressibility: Gases can be compressed into a smaller volume.
5. Expansion: Gases expand to fill the volume available to them.
6. Fluidity: Gases flow easily due to their low viscosity.

Chemical Properties of Gases:

1. Reactivity: Some gases are highly reactive, such as oxygen and chlorine.
2. Inertness: Other gases, such as nitrogen and helium, are relatively unreactive.
3. Combustion: Gases can participate in combustion reactions, such as burning in air.
4. Oxidation: Gases can cause oxidation of metals and other substances.
5. Acid-Base Reactions: Gases can participate in acid-base reactions, such as carbon dioxide and water.