The World of Mixtures

• Mixtures are combinations of two or more substances that are not chemically bonded.

• Heterogeneous mixtures have visibly different components, while homogeneous mixtures have uniform composition.

• Solutions are homogeneous mixtures where one substance dissolves in another.

• Colloids have particles that are larger than in a solution but smaller than in a suspension.

• Suspensions have visible particles that settle over time.

Mixtures:

Combinations of two or more substances that are not chemically bonded. Mixtures can be separated through physical means, such as filtration or distillation. They can have different properties than their individual components and can be homogeneous or heterogeneous. Examples include saltwater, air, and salad dressing.

The World of Matter

• Pure Substances: Matter that has a fixed composition and distinct properties.
• Elements: Pure substances made up of only one type of atom.
• Compounds: Pure substances made up of two or more different types of atoms.
• Properties: Physical and chemical characteristics that define a substance.

Elements

Trivia: Elements are considered pure substances because they cannot be broken down into simpler substances by chemical means. They are the building blocks of matter and are represented by symbols on the periodic table. Examples include oxygen (O), gold (Au), and carbon (C).