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).
Yes
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.
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.
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.
Mixtures are composed of two or more substances that are physically combined but not chemically bonded. The components of mixtures can include solutes (substances that are dissolved) and solvents (substances that do the dissolving). Mixtures can be further classified as homogeneous (uniform composition) or heterogeneous (non-uniform composition).