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Chapter 3 Notes I

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

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Chapter 3 Notes I

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  1. Chapter 3 Notes I Classifying Matter

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

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

  4. TYPES OF SUBSTANCES ELEMENTS AND COMPOUNDS • There are two different types of substances:

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

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

  7. TYPES OF MATTER chemically separable

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

  9. MIXTURES Not uniform Uniform throughout physically separable

  10. 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

  11. 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

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

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