1. Unit 1 – Matter and Energy
Chapter 1- Matter and Change

2. What is Chemistry?
Chemistry:
the study of the composition, structure, and properties of matter, the process that matter undergoes, and the energy changes that accompany these processes.
Chemicals:
any substance with a definite composition.
  Examples: H2O and H2O2

3. Matter and Its Properties
Atom:
Smallest unit of an element…
Element:
A pure substance that CANNOT be broken down into a simpler substance (one type of atom)
Example: Cu or H2
Compound:
A substance that can be broken down into a simpler substance (2 or more elements chemically bonded together)
Example: H2O or H2SO4

4. BP, MP, Density, Conductivity
Physical Property
Measured without changing the substance
Intensive
DOES NOT depend on the amount
Extensive
DEPENDS on the amount
BP, MP, Density, Conductivity
Volume
Mass
Volume, Mass, Energy

5. Behavior of a substance interacting with another
Chemical Property
Behavior of a substance interacting with another
Coal Burning
Iron Rusting

6. Matter and Its Properties
Physical Change:
Chemical Change:
Same substance present BEFORE and AFTER the change
Produces
ONE or MORE new substances.

7. Matter and Its Properties
Indicators of Chemical Change
Precipitate
Gas
Color change
Change in energy
Emission of light

8. Classification of Matter

9. Classification Mixtures Pure substances
Combination of two or more substances that retain their original properties
Kool aid = Water + sugar +flavoring
Pure substances
Matter made of one substance
Gold = 1 type of atom
Orange = not pure because it’s made of more than one substance

10. Mixtures Homogeneous Heterogeneous
No matter what portion you study it’s the same as the rest
Sugar water
Kool-aid
Heterogeneous
The porportions of materials change
Orange juice
Oil and water

11. Pure Substances Elements Compounds
A material that cannot be broken down any further
Found on the periodic table
Gold, silver, oxygen
Compounds
2 or more elements chemically bonded together
Salt = NaCl
Sugar = C6H12O6
Water = H2O

12. Elements Metals Location: left of stair step line.
Properties: good conductor of heat and electricity,
malleable, ductile, high tensile strength.
Nonmetals
Location: right of stair step line.
Properties: poor conductor of heat and electricity, brittle if solid, many are gases at room temp.

13. Elements continued Types of Elements Metalloids
Location: along the stair step line
Properties: have some characteristics of metals and nonmetals
Nobel Gases
Location: group 18
Properties: generally nonreactive