1. Elements, Compounds & Mixtures
8th Grade IPC

2. . . Matter Mixtures Pure substance Elements Compounds Multiple
substances

3. MOLECULE: a group of atoms that are held together by chemical forces
MOLECULE: a group of atoms that are held together by chemical forces. Atoms that make up a molecule act as a unit.

4. Types of pure substances
Elements
Compound
Simplest, pure substance,
One type of atom present
Can’t be broken down physically
Represented by symbols.
Example: Na-Sodium Fe-Iron
2 or more elements chemically combined.
Represented by chemical formulas.
Unique properties that are different from the elements that make it up.
Example: Water H2O, Salt NaCl

5. Element vs Compound
Element is a SUBSTANCE made of the same type of atoms
Compound is made of DIFFERENT ELEMENTS in a definite proportion
ELEMENTS and COMPOUNDS are PURE SUBSTANCES because they CANNOT BE SPLIT APART

6. Types of Mixtures Mixtures
1. Made of more than one kind of pure substance.
2. Can be separated or pulled apart physically ( they aren’t chemically combined)
3. 2 types:
Heterogeneous
Homogeneous

7. Describe in a T-Chart
Pure substances
Mixtures

8. Heterogeneous Mixtures
1. Not the same throughout.
2. Large easily seen particles that can be separated out.
3. Heterogeneous liquid mixtures are also known as suspensions.
Settles after standing.
Examples: salad, Italian dressing,

9. Homogeneous Mixtures Homogeneous Mixtures 1. Appears same throughout
2. Well mixed
3. Will not completely settle upon standing,
4. Tiny unrecognizable particles
5. Homogenous mixtures are also called Solutions.
Examples: Kool-aid

11. Make a T-Chart to compare and contrast the two types of mixtures
Homogeneous Mixture
Heterogeneous mixture

14. Suspensions
(Heterogeneous
Mixtures)

15. Solutions

17. Mixture Question?
What is the difference between a heterogeneous and homogeneous mixture?

20. Graphic Organizer
Create a graphic organizer to show the relationship between the following terms:
elements
compounds
homogeneous mixtures
heterogeneous mixtures
solutions