Methods Used to Separate Mixtures: Common methods include filtration, distillation, chromatography, centrifugation, evaporation, and magnetic separation.

Why Compounds Can’t Be Separated by Physical Means: Compounds cannot be separated by physical means because their components are chemically bonded in fixed proportions, requiring chemical reactions to break those bonds.

Difference Between Homogeneous and Heterogeneous Mixtures: Homogeneous mixtures have a uniform composition throughout (like saltwater), while heterogeneous mixtures consist of visibly different substances or phases (like a salad).

Properties of a Compound vs. Elements: The properties of a compound differ from those of its constituent elements because compounds have unique chemical and physical properties that emerge from the combination of elements.

What is a Solution: A solution is a homogeneous mixture where one substance (the solute) is dissolved in another (the solvent), differing from other mixtures because its composition is uniform and the solute cannot be easily separated by physical means.

Example of a Compound and a Mixture: An example of a compound is water (H₂O), while an example of a mixture is air, which contains various gases like oxygen and nitrogen.