Chapter 2 Properties of Matter

Pure Substance Matter that always has exactly the same composition Elements- substances that cannot be broken down into simpler substances

Compounds A compound is made from two or more elements in fixed proportions and can be broken down Properties are different that those of the elements that make it up

Mixtures Two or more elements or compounds mixed together. Each substance in the mixture retains its own set of chemical and physical properties Properties of a mixture can vary because the composition of a mixture is not fixed Examples; Sand, Salt water,

Types of Mixtures Homogeneous Heterogeneous Parts of the mixture are evenly distributed that looks identical all over Heterogeneous Parts of the mixture are noticeably different from one another

Solutions, Suspensions, and Colloids Based on the size of its largest particles, a mixture can be classified Solution Suspension Colloid

Solutions When substances dissolve and form a homogenous mixture, the mixture is called a solution They do not separate into distinct layers over time You can see through them What are some examples???

Suspensions A Suspension is a heterogeneous mixture that separates into layers over time. Examples? Oil and water, sand and water, muddy water You can filter out the bigger particles

Colloids A colloid contains some particles that are intermediate in size between the small particles in a solution and the larger particles in a suspension Example: Milk Butter