1. Classifying matter

2. Classifying Matter Concept Map
Pure Substances
Elements
Compounds
Mixtures
Heterogeneous
Homogeneous
Mixtures
Separated Physically
Into Pure substances
Compounds Separated Chemically Into Elements

3. Pure Substances Gold Copper Water
Substance that contains only one type of atom (elements) or molecules (diatomic elements and compounds)
Examples: Elements and Compounds
Copper
Water
Gold

4. Elements One kind of atom only
Cannot be broken down into simpler substances by chemical changes
Can be monatomic or diatomic

5. Compounds… Compounds 2 or more kinds of atoms
Can be broken down into simpler substances by chemical changes
Properties of compound are different from component elements
Example: +
NaCl
(Table Salt)
Cl2 (chlorine):
Na (sodium):

6. Mixtures
Combination of 2 or more pure substances in which each pure substance retains its individual chemical properties
Physical blend
May be separated into pure substances by physical methods
No chemical reactions are needed to separate mixtures; substances are NOT bonded

7. 1. Homogenous Mixtures Also called solutions Ex. Air, Kool-Aid
Mixture in which the composition is uniform; constant composition throughout – always has a single phase
Also called solutions
Ex. Air, Kool-Aid

8. 2. Heterogeneous Mixture
A mixture in which the composition is not uniform throughout; does not blend smoothly and in which the individual substances remain distinct

9. Compounds VS Mixtures Compounds Mixtures
Composed of 1 type of particle (Has 2 or more types of atoms)
Components chemically bonded
Components combine in fixed proportion/ratio
Properties are different than those of component elements
Have distinct MP and BP
Composed of more than 1 type of particle
Components NOT chemically bonded
Components can be mixed in any proportion
Properties of each component remain the same
Does not have distinct MP and BP

10. Is this a pure substance or mixture?

11. Classifying Matter Summary
The flow chart summarizes the process for classifying matter. Any sample of matter is either an element, a compound, or a mixture. Interpreting Diagrams What is the key difference between a substance and a solution?

12. Think, Pair, Share: Element, Compound, or Mixture?
1. ____________
2. ____________
3. ____________
4. ____________
5. ____________