Element:
One type of atom; cannot break it down any further w/o
changing properties.
Compound:
Atoms evenly distributed; two or more elements fixed
properties
Compound:
A combination of a substance that are chemically bonded
Mixture:
A combination of a substance that is not chemically
bonded
Heterogeneous Mixture:
Where you can see the parts of the mixture that are
different from one another.
Homogeneous Mixture
Where the substances are so evenly distributed that it is
hard to distinguish one substance from another.
Homogeneous Mixture
Kool-Aid
Lemonade
Glass
Salt Water (Seawater)
Soft Drinks
Heterogeneous Mixture
Sand
Salad
Bottle of salad dressing
Toppings on a Pizza
Dirt Water
Solution:
A mixture that forms when substances dissolve and form a
homogeneous mixture.
 Small Particles
Suspensions:
A heterogeneous mixture that separates overtime and into layers.
 Large Particles.
Colloid:
A mixture that contains some particles in a solution and the large
particles in a suspension.
 Medium Particles
Solution:
Kool-Aid, Lemonade, Salt Water
Suspensions:
Dirt Water, Sand
Colloid:
Milk, Jell-O, Butter, Fog
A property that can be observed without a chemical
change.

Viscosity: A substances resistance to flowing

Conductivity: The ability to transfer heat or electricity

Malleability: Ability to be hammered without shattering
Hardness: Harder materials scratch softer materials
 Melting Point: The point a substance changes from a
solid to a liquid


Boiling Point: The point a substance boils

Density: The ratio of mass per volume
Occurs when a substance is changing into a different
substance.
Flammability:
A materials ability to burn in oxygen
Reactivity:
A materials ability to combine and react with other
chemicals
1. Change in color
2. Production of gas
3. Formation of a precipitate
Solids:
Have a definite shape and a definite volume
 Slow molecules, low energy
Liquids:
Definite volume but not a definite shape
 Medium energy molecules
Gases:
No definite shape, no definite volume
 Fast molecules, high energy
All particles of matter are in constant motion.
Exothermic: Energy is lost
Endothermic: Energy is gained
 Melting (solid to liquid) - endothermic
 Freezing (liquid to solid) - exothermic
 Evaporation (liquid to gas) - endothermic
 Condensation (gas to liquid) - exothermic
 Sublimation (solid to gas) - endothermic
 Deposition (gas to solid) - exothermic
Ionic Bond:
Transfer of an electron between one atom to another.
Covalent Bond:
Sharing of electrons between atoms
Physical Change.
Kool-Aid:
 Homogeneous
Salad:
 Heterogeneous
Salt-water
 Homogeneous
Melting: (Solid to a liquid)
Sublimation: (Solid to gas)
Any Questions
Section #3 Packet due tomorrow!!