* Homogeneous mixture: A homogeneous mixture is a combination of substances where the components are evenly distributed throughout. The individual substances retain their original properties.

* Compound: A compound is formed when two or more elements chemically combine in a fixed ratio. The resulting compound has entirely new properties different from the original elements.

Example:

* Air: Air is a homogeneous mixture of nitrogen (N2) and oxygen (O2) gases. Air supports combustion (burning), but neither nitrogen nor oxygen alone readily supports combustion.

* Nitrogen Oxide (NO): Nitrogen and oxygen can react to form nitrogen oxide (NO), a compound with very different properties from nitrogen or oxygen. Nitrogen oxide is a reactive gas that contributes to air pollution and acid rain.

Key Differences:

1. Chemical Bonding: Compounds are formed by chemical bonds, where atoms share or transfer electrons. Mixtures do not involve chemical bonding.

2. Properties: Compounds have distinct properties that differ from the original elements. Mixtures retain the properties of the individual components.

3. Separation: Components of a mixture can be separated by physical means (like evaporation or filtration). Compounds can only be broken down by chemical reactions.

In summary: While a homogeneous mixture of nitrogen and oxygen might share some physical properties with air, it will not have the same chemical properties as a compound formed from nitrogen and oxygen.