Classification of Matter
Name: ___________________________________________
Date: ____________
All matter can be classified as either an element, a compound, or a mixture
Element – A substance made of only 1 type of atom
How many elements do you know?
What element…
1. …has the same name as a U.S. Coin?
_____________________
2. …is a metal and is found in blood?
_____________________
3. …is an important mineral found in milk?
_____________________
4. …is found in toothpaste to help prevent cavities?
_____________________
5. …is needed in order for something to burn?
_____________________
6. …is used in glowing signs?
_____________________
7. …makes balloons float?
_____________________
When two or more elements are chemically bonded it is called a compound___________
 Fixed ratio of elements

Cannot be physically separated
Examples: CO2, H2O
Elements and compounds are pure substances_________ with consistent properties
A physical blend of two or more elements or compounds is a mixture______________
 Variable composition

Can be physically separated
Examples: Salad, salt water
What are good questions to ask to determine if something is a compound versus a mixture:

Does it have a consistent formula? (If yes, then a compound)

Do the parts maintain their own identities? (If yes, then a mixture)
Label each of the following as an element, compound, or mixture:
Soda:
________________________
Sodium Chloride:
________________________
Helium:
________________________
Air:
________________________
Mixtures can be further classified as either homogeneous or heterogeneous
different
A heterogeneous mixture is a mixture that has visibly different parts.
Ex) granite, or chocolate chip cookies
same
A homogeneous mixture does not contain visibly different parts.
Ex) air, seawater, milk
Write down at least one example of a homogeneous mixture and one of a heterogeneous mixture:
Homogeneous:
Heterogeneous: