Chapter 3 Notes I Classifying Matter

PROPERTIES OF MATTER What is matter? What is mass? Anything that has mass and takes up space The amount of matter an object contains

SUBSTANCES A substance is matter that has a definite and uniform composition One type of “stuff”

TYPES OF SUBSTANCES There are two different types of substances: AND

ELEMENTS An element is the simplest forms of matter. Each element is represented by a chemical symbol.

COMPOUNDS A compound is a substance that can be separated into simpler substances only by chemical means

TYPES OF MATTER chemically separable

MIXTURES A mixture is a physical blend of two or more substances that can be physically separated. How? One type of “stuff” More than one type of “stuff” together

MIXTURES Not uniform Uniform throughout physically separable

HETEROGENEOUS vs. HOMOGENEOUS There are 2 different types of mixtures. –A heterogeneous mixture has more than one phase or substance (looks different) –A homogeneous mixture has only one phase (looks the same) Also called a SOLUTION

Types of Heterogeneous Mixtures Colloids –Particles never settle –Displays the Tyndall Effect Scattering of light particles Ex) Fog, milk, shaving cream Suspensions –Visible particles settle –Require agitation to stay mixed Ex) OJ, Italian dressing, sand & water

HETEROGENEOUS OR HOMOGENEOUS? Saltwater Spaghetti sauce Muddy water Cough syrup Salad Brass Homogeneous Heterogeneous