UNIT 02: Atomic Theory
BCLN CHEMISTRY 11 - Rev. July, 2015
Project: Loopy Lewis Structures
Potential Credits:
Name: ________________
/20
Goal:
The goal of this project is to help you gain a greater understanding of concepts related to Lewis
structures such as valence electrons, combining capacity, isoelectronic, the octet rule, lone pairs,
bonding pairs, ionic give and take, and covalent sharing. Often physically moving electrons around
can help your brain to comprehend and remember how bonding works.
Materials:
To complete this project you will need blank white paper, scissors, Fruit Loops (or some other round
objects to represent electrons such as pennies) and a camera that can take and upload pictures such as
an iphone or android phone.
Instructions:
Create each of the following, take a picture, paste it into this word document below the question and
submit this document.
1. Two different elements that have 7 valence electrons
2. Two different elements that have 1 valence electron
3. The four possible ionic compounds that can be created from each of your chosen elements
4. An element with a combining capacity of 0
5. An element with a combining capacity of -2
6. An element with a combining capacity of +3
7. An ionic compound created from the elements you chose for question 5 and 6.
8. A noble gas, a positive ion and a negative ion that are all isoelectronic with each other
9. An element with 1 lone pair.
10. An element with 2 lone pairs.
11. Before bonding and after bonding pictures for each of the following covalent compounds. Be
sure the octet rule is obeyed in the bonding picture for each element!
Cl2
O2
N2
CCl4
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UNIT 02: Atomic Theory
BCLN CHEMISTRY 11 - Rev. July, 2015
Examples:
Here is an example of a magnesium atom Lewis structure. It has 2 bonding electrons and 0 lone
pairs. This means a total of 2 valence electrons
Here is an example of a chlorine atom Lewis structure. It has 1 bonding electron and 3 lone pairs.
This means a total of seven valence electrons.
This is a before bonding picture for MgCl2.
This is an after bonding picture for MgCl2. Notice that the positive ion now has zero valence
electrons while the negative ion now has 8 valence electrons.
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