What term describes a mixture that has a uniform composition throughout?

The correct term for a mixture that has a uniform composition throughout is "homogeneous." In a homogeneous mixture, the individual components are evenly distributed at the molecular or atomic level, making it difficult to distinguish one substance from another. This uniformity often leads to a consistent composition and properties throughout the entire mixture.

For example, solutions like saltwater or vinegar are homogeneous mixtures, where the dissolved substances are evenly dispersed in the solvent. The characteristics of a homogeneous mixture contribute to a stability in properties such as color, density, and taste, which do not vary from one part of the mixture to another.

In contrast, heterogeneous mixtures have visibly different components and uneven distribution, leading to distinct phases or boundaries that can often be observed. Colloids and suspensions are specific types of heterogeneous mixtures, with colloids containing small particles that remain dispersed but can scatter light, and suspensions containing larger particles that can settle over time.