How is a homogeneous mixture characterized?

A homogeneous mixture is characterized by having a uniform composition throughout. This means that the components of the mixture are so thoroughly mixed that you cannot distinguish one part of the mixture from another. For example, if you consider a solution of salt in water, the salt is evenly distributed at the molecular level throughout the water, resulting in the same concentration of salt regardless of where you sample the mixture.

In a homogeneous mixture, the individual components are not visible, and they do not settle out upon standing. This uniformity is the defining feature that distinguishes homogeneous mixtures from heterogeneous ones, which exhibit variation in composition and may have visibly different phases or layers.