* Mixtures are combinations of substances where each substance retains its own chemical identity.

* Compounds are formed when two or more elements chemically combine in a fixed ratio, resulting in a new substance with different properties.

Here's how alloys fit the definition of a mixture:

* Variable composition: Alloys can be made with different proportions of their constituent metals. For example, bronze can have varying ratios of copper and tin.

* Retention of properties: The metals in an alloy generally retain their individual properties to some degree. For example, the shiny metallic luster of copper is still present in bronze.

* Physical separation: The components of an alloy can usually be separated by physical means (like melting and using different densities).

Example:

Bronze is an alloy of copper and tin. The copper and tin atoms are not chemically bonded together in a fixed ratio. Instead, they are physically mixed, which is why bronze can have different compositions and still be considered bronze.

In summary: Alloys are homogeneous mixtures of metals, where the constituent metals are not chemically bonded but physically combined.