Chapter 3 Notes IClassifying 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

chemicallyseparable

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

Homogeneous

Homogeneous

Heterogeneous

Heterogeneous

Heterogeneous