Unit 5 Vocabulary Preview
Prefixes/Suffixes/Roots
OctNonDiTetraTriElectr-
Eight
Not
Two
Four
Three
Having to do with electricity
Key Vocab
1. Ionic Bond
2. Covalent Bond
3. Metallic Bond
4. Valence Electrons
5. Octet Rule
6. Electron Dot Structure
7. Lewis Structure
8. VSEPR Theory
9. Stable State
10. Bonding State
11. Electronegativity
12. Percent Ionic Character
13. Polar Covalent
14. Nonpolar Covalent
15. Diatomic
16. Lone Pair
17. Resonance Structure
18. Isomer
19. Structural Isomer
20. Geometric Isomer
21. Optical Isomer
22. Van der Waals Forces
23. Dipole Interactions
24. Hydrogen Bonds
25. Dispersion Forces
26. Alloy
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http://misterguch.brinkster.net/VSEPR.html
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Name: _________________________
Class: ______________
Worksheet #1 - Let’s Bond!
1. Complete the table for each element listed.
Element
# of
Protons
# of
Electrons
# Valence
Electrons
Oxidation
Number
Stable Dot
Structure
Bonding
Dot
Structure
Sodium
Chlorine
Silicon
Fluorine
Calcium
Oxygen
Phosphorus
Boron
2. What is a chemical bond?
3. Fill in the chart below:
Type of
Bond
Types of Elements
(ex. metal and nonmetal)
Definition
Example
Compound
Metallic
Ionic
Covalent
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4. Complete the following table using the information on page 6 of this packet.
Atoms Electronegativity
Difference
% Ionic
Character
Bond
Type
More
Electronegative
Atom
H
N
S
O
K
Br
Si
Cl
H
F
C
H
Se
S
O
O
5. Show the bonding structures and transfer of electrons in each of the following ionic bonds.
Also include the symbols with oxidation number and then write the chemical formula.
a. Potassium + Fluorine
b. Magnesium + 2 Iodines
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c. 2 Sodiums + Oxygen
d. Sodium + Chlorine
e. Calcium + 2 Chlorines
f. Aluminum + 3 Bromines
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Let’s Bond Worksheet
Problem #3 Helpful Hints
The type of bond an atom makes is determined by its electronegativity. The greater the
difference in electronegativity, the more the electrons are pulled from an atom, which results in
an ionic bond. If there is not a great difference in electronegativity, the atoms share electrons,
which is a covalent bond.
Table of Electronegativity Values
Electronegativity Difference = Subtract the larger electronegativity by the smaller
electronegativity
% Ionic Character = Divide the electronegativity difference by the larger electronegativity and
multiply by 100
Bond Type = Look at the Percent Ionic Character and see which of the following categories it
fits into



<5 % = Nonpolar Covalent (NC)
5% - 50% = Polar Covalent (PC)
>50% = Ionic (I)
Example:
Atoms
Mg
1.2
Cl
3.0
Electronegativity
Difference
3.0 – 1.2 = 1.8
% Ionic
Character
Bond Type
More
Electronegative
Atom
1.8/3.0 x 100 =
60%
I
Cl
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Worksheet #2 – Covalent Bonding
Complete the chart for each element.
Element
# of Protons
# of Electrons
# of Valence
Electrons
# of Electrons Needed
to be Stable
Carbon
Chlorine
Hydrogen
Phosphorus
Oxygen
Sulfur
Nitrogen
Using dot structures, complete each covalent bond like we did in the notes. Draw circles to show
the sharing of electrons, draw the bond structure using symbols and lines, and write the chemical
formula.
1. Hydrogen + Hydrogen
2. 2 Hydrogens + Oxygen
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3. Chlorine + Chlorine
4. Oxygen + Oxygen
5. Carbon + 2 Oxygen
6. Carbon + 4 Hydrogen
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