This is proved by chemical analysis.
Mixtures don't necessarily have fixed composition
Based on the distribution of their components, mixtures can be classified as heterogeneous mixtures or as homogenous mixtures.
Chemical elements are not mixtures (I do not think to the isotopic composition).
Compounds differ from mixtures because compounds have a fixed chemical composition with elements chemically bonded in a specific ratio, while mixtures can vary in composition with no fixed ratio. Compounds have specific properties different from their constituent elements, while mixtures retain the properties of their components.
Yes
Homogeneous and heterogeneous are both terms used to describe mixtures. Homogeneous mixtures have uniform composition throughout, whereas heterogeneous mixtures have uneven composition with visible boundaries between the components.
no, heterogeneous mixtures are not uniform, homogeneous mixtures have a fully uniform composition.
No, not all mixtures are classified as heterogeneous. Mixtures can be either heterogeneous or homogeneous. Heterogeneous mixtures have visibly different components, while homogeneous mixtures have uniform composition throughout.
Solutions are called homogeneous mixtures because they consist of uniformly distributed components at the molecular level, resulting in a consistent composition throughout. In a homogeneous mixture, the different substances cannot be distinguished from one another, as their properties blend seamlessly. This uniformity ensures that any sample taken from the solution will have the same composition as any other sample, making it distinct from heterogeneous mixtures, where the individual components remain separate.
Homogeneous mixtures have uniform composition throughout, with the same properties in all parts. Heterogeneous mixtures have non-uniform composition, with distinct phases or regions that can be visually identified.
A substance has a specific chemical composition while mixtures contain more than one substance.
The property that determines the type of mixture is the uniformity of its composition. Homogeneous mixtures have uniform composition throughout, while heterogeneous mixtures have visibly different components that can be separated easily.