Matter: pure substances: element and compound
mixture: homogeneous mixture and heterogeneous mixture
A pure substance is a substance made of only one kind of matter and having definite properties. An element is composed of a ingle kind of atoms. A compound is composed of two or more elements in a specific ratio. Chemists cant easily separate the components of a compound. Mixtures are physical combinations of pure substances. Different parts of a mixture can be easily separated by physical means. A heterogeneous mixture is a mixture whose composition varies from position to position within the sample. A homogeneous mixture sometimes called solution is relatively uniform in composition. Solvent and solute.
State: solid Solvent: solid Solute: solid Example: steel (Fe+C)
State: liquid Solvent: liquid Solute: solid,liquid,gas Example: salt in water,alcohol in water,oxygen in water
State: gas Solvent: gas Solute: gas Example: air(N2+O2)