Student page
IPC
Paper Ions
Enduring Understandings
All matter in the universe is composed of the same basic building
blocks.
Specific properties determine the behavior of matter.
Concepts Important to Know and Understand
chemical reactions, atomic structure
EQ: Can I eat off the periodic table?
How do chemical reactions keep me
alive?
?
Targeted Skills


Using the periodic table
Using a model
Broad Brush Knowledge
Bonding, chemical formulas and equations, valence electrons
Core Objectives
1. Demonstrate the proper use and care of laboratory equipment and
supplies.
6. Predict an element’s behavior based on its location on the periodic
table.
7. a) Differentiate between ionic and covalent bonding.
Purpose
Construct models of compounds forming between two ions.
Materials
 Set of Ion cards
 Scissors
 Glue
 Construction paper
 Markers
Lab Preview
1. How many electrons must be in the outer shell for an element to be chemically stable?
2. How do the electrons behave during ionic bonding?
3.
What types of elements do we expect to join together with ionic bonds?
Procedure
1. Before you begin, place the valence electrons in their proper place using E-dot diagram structures on
each “ion”.
2. Cut the ions apart from one another.
3. In the data chart below, are + ions and – ions that will bond to form a compound. Your job is to find how
many of each you need to form a stable compound.
4. Glue each model onto the construction paper with the + ion(s) on the left and the – ion(s) to the right.
5. Draw arrows showing the path of electrons moving.
6. Write the formula for the compound formed under the model and also in your data chart.
updated 6/11/2003
1
Student page
Positive ion
Negative ion
Al
Br
Na
O
Na
I
K
S
Li
Cl
Al
O
Na
P
Formula
Data Analysis
1. List the similarities between lithium chloride and sodium iodide.
2. Why might lithium lose one electron rather than gain 7 electrons?
3. When electrons leave aluminum, what happens to the balance of positive and negative charges?
What is aluminum’s oxidation number?
4. What happens to oxygen’s charge when it gains the electrons from the aluminum atom? What is
oxygen’s oxidation number?
5. When sodium and chlorine form a chemical bond, what is the overall charge of the molecule? Why
do you think sodium and chlorine combine in a 1:1 ratio?
updated 6/11/2003
2
Student page
Br
Br
P
O
O
O
S
Cl
Br
I
O
Al
Na
K
K
Na
Al
Al
Na
Li
Na
Na
Na
updated 6/11/2003
3