1. Draw a line between the molecule and its name.
Hydrogen chloride HCl
Chlorine Cl2
Carbon dioxide CO2
Methane CH4

2. Classifying Matter: Compounds, Mixtures, Solutions

3. Atoms Elements Compounds Molecules
Pure Substances
A sample of matter that has definite chemical and physical properties.
Atoms
Elements
Compounds
Molecules

4. Compounds
Pure substance composed of two or more different elements joined by chemical bonds.
Made of elements in a specific ratio
that is always the same
Has a chemical formula
Can only be separated by
chemical means, not physically
H2O
NaCl
CO2

5. Mixtures
A combination of two or more pure substances that are not chemically combined.
substances held together by physical forces, not chemical
No chemical change takes place
Each item retains its properties
in the mixture
They can be separated physically

6. Mixtures vs. Compounds

7. Can you identify the following?
You will be shown a series of photos. Tell if each photo represents an item composed of an element, compound, or mixture.
Review:
An element contains just one type of atom.
A compound contains two or more different atoms joined together.
A mixture contains two or more different substances that are only physically joined together, not chemically.
A mixture can contain both elements and compounds.

8. Element, Compound, or Mixture?
Copper
Rocks
Mixture
Element Cu

9. Element, Compound, or Mixture?
Jelly Beans
Table Sugar
Mixture
Compound
C12H22O11

10. Element, Compound, or Mixture?
Sand
Diamond
Element C
Mixture

11. Types of Mixtures

12. Homogeneous mixtures
Homogeneous mixtures : is a mixture in which the components are evenly distributed.
A type of homogenous mixtures is a SOLUTION
Examples: Salt dissolved in water, sugar dissolved in water, apple juice, tea, copper (II) sulfate solution in water, alloys....

13. Heterogeneous mixtures
Heterogeneous mixture : the components are not evenly distributed among each other.
Examples: Sand water, oil and water, milk, sulfur and iron, granite, blood...

16. Solutions A mixture that appears to be a single substance
One substance is dissolved in another substance
Solute – substance that is dissolved
Solvent – substance that does the disolving
Soluble – able to dissolve
Insoluble – unable to dissolve
Examples of solutions:
Salt water
Sugar water
Gasoline
Soft drinks
Air

17. suspensions
Mixture in which particles of a material are dispersed throughout a liquid or gas but large enough to settle out
Can be separated by filtration
Examples:
Snow globe
Italian dressing
Medicines
Orange juice

18. Read and summarize material (be prepared to share your answers)
Mixtures
States of Matter
Separation of Mixtures