Things to do…
1) Update Table of Contents (TOC)
2) Grab pages on the zebra table!
3) Open up to page 12
4) GET ORGANIZED!!! NOW!!!
Make a layered foldable like this…
Fold 
HETERO MIX
Fold 
MIXTURE
HOMO MIX
ELEMENT
Open

COMPOUND
SUBSTANCE
What is Chemistry?
• Chemistry: study of matter and how it changes
• Matter: anything with mass that takes up space
Everything is made of matter.
Mass: amount of matter something has
Volume: amount of space an object occupies
Density: amount of
mass per unit of
volume in an object
(how much stuff did
you cram in the box)
There are 2 types of matter
Matter
Pure
Substance
Mixture
Pure Substance
• Matter that has a uniform and
definite composition (this
means the same is exactly the
same from one side to the
other)
• Definite melting/boiling points
• A substance is either an element
or a compound
Element: simplest form of matter.
• cannot be separated into simpler substances
• made of ATOMS
• building blocks of all other substance
• can be found on the periodic table
uniform
• chemical symbol: 1 – 2 letter(s) representing
the element
Carbon C
Gold Au
Hydrogen H
TO DO!
• Get out page 11 & 12 ASAP!
• Take a dry erase marker and a plastic sheet on
your desk and classify those changes as P or C.
You may NOT work with your neighbor. Do
this FAST!
While I am teaching…
Compound: Substance containing 2+ elements
that are CHEMICALLY combined in a fixed
ratio.
•
properties are DIFFERENT from the the elements it is made
from
•
CAN be separated into simpler substances by chemical
means (chemical reaction needed!) i.e. YOU can’t
separate water but a reaction called hydrolysis can!
•
Has a chemical formula: shorthand method of writing
composition of compounds
Sugar or Sucrose (C12H22O11)
12 carbon atoms
H2O
22 hydrogen atoms
11 oxygen atoms
RATIO
Compounds
• Elements that make up the compound look
NOTHING like the final compound. Take a look…
Sodium (Na) + Chlorine (Cl)
 Sodium Chloride
reaction
Mixture: physical blend of two or
more substances (no rxn, just dumped)
• Variable composition
Mixtures!
Homogeneous
Mixtures!
Types of Mixtures:
“same”
Homogeneous mixture - uniform
composition (looks the same!)
• also called a solution
• components (parts) are NOT readily
distinguished - well blended but not
chemically combined
(means you can’t see them easily!)
Examples: Kool-Aid, HCl (aq), salt water
“different”
Heterogeneous mixture: not uniform in
composition (can pick them apart easily)
• components are readily distinguished
(which means you CAN see them!)
• Not blended well
• Separates sometimes due to gravity
• Examples: trail mix, sand, this class!
Matter Concept Map – hurry!
Can NOT be
physically separated
CAN be physically
separated
Can NOT be broken
down into simpler
substances
CAN be broken down
into simpler
substances
- Uniformly Mixed
- Components NOT
easily distinguished
Examples:
Examples:
Examples:
-Not Uniformly Mixed
- Components easily
distinguished
Examples:
Mixture Separation
a) Physical properties can be used to separate mixtures
b) Physical Properties
(i) Size - filter
(ii) magnetism
(iii) color
(iv) distillation: Separate a mixture of liquids
based on a difference in boiling points
(v) chromatography: separates dyes/pigments
(vi) crystallization (evaporation)
How would you separate a mixture
of Kool-Aid and ice into its 3 components?
Types of Separation!
Which is which??
GAME DAY THURSDAY!!! 9/11
1. Update table of contents
2. Get binder organized
3. Put “BUY SCIENTIFIC CALCULATOR” on your
weekend to-do list!!! Paper towels too!
4. An unknown chemical has a variable melting
point, looks uniform throughout and can be
separated physically. What type of chemical
is this? Write this at the bottom of p. 14.
Don’t share your answer with your neighbor!
• Get out your page 14 homework
Can NOT be
physically separated
CAN be physically
separated
Can NOT be broken
down into simpler
substances
CAN be broken down
into simpler
substances
- Uniformly Mixed
- Components NOT
easily distinguished
Examples:
Examples:
Examples:
-Not Uniformly Mixed
- Components easily
distinguished
Examples:
Let’s check it!
Soda Bottles
Get out a piece of notebook paper
Letter
A
B
C
D
E
F
G
H
I
J
K
L
Chemical Name
Substance or Mix?
Element, Compound,
Homo Mix or Hetero Mix
Check yourself!!!
Letter Chemical Name
A
copper sulfate in water
Substance or
Mix?
Element, Compound,
Homo Mix or Hetero
Mix
Mixture
Homo mix
B
Zinc
Substance
Element
C
Hydrogen peroxide, H2O2
Substance
Compound
D
Sugar water
Mixture
Homo mix
E
Cheerios
Mixture
Homo mix
F
Copper chloride
Substance
Compound
G
Soil
Mixture
Hetero mix
H
Potassium Permanganate (aqueous)
Substance
Homo mix
I
Fruity pebbles
Mixture
Hetero mix
J
Calcium
Substance
Element
K
Copper sulfate
Substance
Compound
L
Copper
Substance
Element
Nuts & Bolts
Identity:
BOLTS
4 N, 4 B
NUTS
WASHERS
2 NBW
Element
Compound
Mix of E
Mix of C
Mix of C + E
Nuts & Bolts answers
Or 3 NB
compound
Are you with me???
Start studying elements