Name: __________________________________________________________
Date: ______________________
Directions:
1.
You need to be sure to go over ALL of the pages in your classwork section; these notes will help you
complete this study guide.
2. You should also look back at all of your exit tickets and daily goals to see which topics you may want to
spend extra time on. Your homework worksheets would also be a good source.
3. Try to complete as much as you can without looking at your notes. After that, go back through your
notes to help you fill in the rest.
A. Fill in the missing information in the chart to the
right.
B. Use the electron shells below to draw a model of a
nitrogen atom. Use the following key to help you
complete the model:
Particle
Location
Charge
Proton
Inside nucleus
Positive
Neutron
Inside nucleus
Neutral
Electron
Outside nucleus
Negative
Key:
= protons =
7
= electrons =
7
= neutrons =
7
C. Now use the electron shells below to draw a model of a fluorine atom.
Key:
= protons =
9
= electrons = 9
= neutrons = 10
a. What is the particle that makes these two elements VERY different from each other?
The PROTONS make each element different from one another.
D. Fill in the missing information into the graphic organizer below.
atoms
_________________
make up
elements
_________________
Two or more elements
CHEMICALLY combined
make up
Two or more elements
PHYSICALLY combined
make up
compounds
_________________
mixtures
_________________
E. The following circles represent ONE atom. Each color circle represents a DIFFERENT kind of atom. Use the
different circles to draw examples of the following types of matter. Then, below your picture, give a real life
example of each. The example of molecule has been done for you.
One atom of
Element A
Element
Example:
Carbon
One atom of
Element B
Mixture
Example:
Salt & pepper
Compound
Example:
Salt
Molecule
(this should be ONE unit of
the compound you drew)
Example:
One molecule of salt has 1
sodium atom and 1
chlorine atom.
F. Use your periodic table to fill in the missing information below.
This is the ATOMIC NUMBER.
The atomic number tells us the number of
protons in the element. (It is ALSO equal to
the number of electrons.)
This is the ATOMIC MASS.
This tells us the TOTAL number of protons PLUS
neutrons.
This is the Chemical Symbol.
This is the Chemical Name.
G. Use your periodic table to fill in the missing information below.
Chemical
Symbol
Atomic
Number
Atomic Mass
Protons
Electrons
Neutrons
Potassium
K
19
39
19
19
20
Nickel
Ni
28
59
28
28
31
Lead
Pb
82
207
82
82
125
Chemical Name
H. A chemical formula is a way of writing a compound to tell us what ELEMENTS are in the compound.
a. Look at the following chemical formulas and identify what ELEMENTS are in the compound.
b. Then, tell us how many ATOMS of each element are present in the compound.
N2O
C8H10N4O2
Nitrogen
# of
Atoms
2
Hydrogen
# of
Atoms
2
Oxygen
1
Sulfur
Oxygen
Elements
I.
H2SO4
Elements
Carbon
# of
Atoms
8
1
Hydrogen
10
4
Nitrogen
4
Oxygen
2
Elements
Silver Nitrate is one of the compounds we used in our lab.
a. Silver Nitrate has the following elements in it, in this exact order:
i. One atom of Silver (Ag)
ii. One atom of Nitrogen (N)
iii. Three atoms of Oxygen (O)
b. Use the above information to write the CHEMICAL FORMULA: AgNO3
J. Fill in the following venn diagram with information about physical and chemical changes.
Physical Changes



A change in size, shape or
state
The original substance
does NOT lose its identity
Does not change into
anything new
Chemical Changes
True of Both


A change in matter.

A substance changes
from one substance into a
NEW substance with new
& different properties.
The original substance
DOES lose its identity
K. Identify which of the following examples are examples of a chemical change by placing an X in the box. One
example has been done for you.
Example of Matter Changing
Chemical Change
X
X
Bleaching a shirt
Leaves changing color in the fall
Ice melting
Salt dissolving in water
X
A necklace tarnishing (when jewelry turns a brownish color)
Cutting pancakes
X
Cooking pancakes
L. A chemical equation is a way to represent a chemical change.
a. Using the chemical equation below,
DRAW A CIRCLE
DRAW A SQUARE around the PRODUCTS.
Zn
+
HCl
around the REACTANTS and
ZnCl2
+
H2
b. When a compound has a coefficient attached, the coefficient tells us how many MOLECULES of that
compound are present. For example:
+
+
M. Below are some examples of chemical equations.
a. Determine if each equation is balanced by counting the atoms on each side of the equation.
b. Then, write a letter B in the space if the equation is balanced and a U in the space if it is unbalanced.
______
B
U
______
CH4
+ 2O2
CO2
C=1
C=1
H=4
H=4
O=4
O=4
2P
+
3Cl
2PCl3
P=2
P=2
Cl = 3
Cl =6
+
2H2O
N. Use the chart below to fill in the top 3 elements found in each of these locations. Use the graphs/charts below
to help you fill in the missing information.
Earth’s Atmosphere
Earth’s Crust
Earth’s Oceans
Human Body
Top Element # 1
Nitrogen
Oxygen
Oxygen
Oxygen
Top Element # 2
Oxygen
Silicon
Hydrogen
Carbon
Top Element # 3
Argon
Aluminum
Chlorine
Hydrogen