Bonding HW Unit 5
Vocabulary
For each word, provide a short but specific definition from YOUR OWN BRAIN! No boring textbook definitions.
Write something to help you remember the word. Explain the word as if you were explaining it to an
elementary school student. Give an example if you can. Don’t use the words given in your definition!
Ionic Bond: ________________________________________________________________________________
Covalent Bond: _____________________________________________________________________________
Metallic Bond: ______________________________________________________________________________
Molecular: _________________________________________________________________________________
Sea of mobile electrons: ______________________________________________________________________
Electronegativity: ___________________________________________________________________________
Polar Bond: ________________________________________________________________________________
Nonpolar Bond: _____________________________________________________________________________
Polar Molecule: _____________________________________________________________________________
Nonpolar Molecule: _________________________________________________________________________
Linear Molecule: ____________________________________________________________________________
Bent Molecule: _____________________________________________________________________________
Pyramidal Molecule: _________________________________________________________________________
Tetrahedral Molecule: _______________________________________________________________________
Shared pairs: _______________________________________________________________________________
Unshared pairs: _____________________________________________________________________________
Symmetrical: _______________________________________________________________________________
Intermolecular Forces: _______________________________________________________________________
Hydrogen Bonding: __________________________________________________________________________
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Bonding HW Unit 5
Lesson 1: Types of Bonds
1. When bonds are formed energy is __________ because compounds are _________ stable than
elements.
2. When bonds are broken energy is __________ because compounds are _________ stable than
elements.
Complete the Venn diagram below with properties of ionic and Covalent Bonds:
3. Bonds formed between two nonmetals are _______________ and involve the ____________ of
electrons.
4. Bonds formed between two metals are _______________ and involve the ____________ of electrons.
5. Bonds formed between metals and nonmetals are ____________ and involve the ___________ of
electrons.
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Bonding HW Unit 5
6. Describe the following as ionic, metallic, or covalent:
NaCl
_____
Al
_____
CO2
_____
CO
_____
Au
_____
Ti
_____
MgBr2
_____
K2O
_____
Fe
_____
CH4
_____
H2O
_____
H2S
_____
Ca3(PO4)2
_____
PI3
_____
Lithium
_____
NH4Cl
_____
7. Polyatomic ions contain ____________________ bonds but form ____________________ compounds.
8. Circle the formulas in question #6 that contain polyatomic ions.
9. Fill in notes on the chart below:
Ionic
Covalent
Metallic
Hard or soft?
Shiny or dull?
High or low
melting point?
High or low
boiling point?
Conducts?
(When?)
Solid, liquid or gas?
What happens to
the electrons?
Example of a substance
with these bonds
10. What is a “sea of mobile electrons?” How is it formed?
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Bonding HW Unit 5
Lesson 2: Bond Polarity


_________________________ indicates how strongly an atom of an element attracts electrons in a
chemical bond. Electronegativity values are assigned according to arbitrary scales.
The electronegativity difference between two bonded atoms is used to assess the degree of
__________________________ in a bond.
10. What makes the bond between H and O polar?
11. The most polar bonds are those between atoms that have the biggest difference in electronegativity.
Which is the most polar? Show your work.
a. HF
b. HCl
c. HBr
d. HI
12. Are any of the molecules in question 11 nonpolar? If so what are they?
13. Complete the table from the video:
Electronegativity difference
14. Label as containing polar or nonpolar bonds:
a. NO
b. CCl4
c. F2
Bond type
Nonpolar
Polar
Very Polar
Ionic
d. CH4
e. CS2
f. H2O
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Bonding HW Unit 5
Lesson 3: Lewis Dot Diagrams for Ionic Substances
Draw the Lewis Dot diagram for the following Ionic Substances:
1. K+Br
2. Mg+Cl
3. Na+S
4. Ca+S
5. K+O
6. Mg+N
7. Al+Br
8. How many valence electrons do all the cations have when they bond?
9. How many valence electrons do the anions have when they bond?
10. What is happening to the electrons? (shared, transferred or sea?)
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Bonding HW Unit 5
Lesson 4: Drawing Dot Diagrams for Covalent Substances
Draw lewis dot diagrams for the following substances:
1.
F2
2.
O2
3.
H2S
4.
CO2
5.
HCl
6.
NH3
7.
H2
8.
N2
9.
How many electrons are shared in a double bond?
10.
How many electron pairs are shared in a double bond?
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Bonding HW Unit 5
Lesson 5: Molecular Polarity
Use polar or nonpolar in the blanks and your answers:
1. Symmetrical molecules are ________________ and asymmetrical molecules are ________________.
2. Draw the following and decide if they are polar or nonpolar molecules:
H2
______________
HI
H2S
_______________
_______________
NH3
_______________
Fill in the chart below:
Shape of Molecule
Polar or Non Polar
Symmetrical or Asymmetrical
Linear (ex. N2)
Linear (ex. HBr)
Bent
Pyramidal
Tetrahedral
In terms of lone pair electrons, how can you determine if a molecule is polar?
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Bonding HW Unit 5
Lesson 6: Intermolecular Forces of Attraction
Define the words to complete the following chart using prior knowledge and today’s video:
Compound:
Intramolecular Forces:
Intermolecular Forces:
Ionic Bonds:
Metallic
Bonds:
Covalent
Bonds:
Dispersion:
DipoleDipole:
Hydrogen
Bonding:
Properties:
Properties:
Properties:
Strength:
Strength:
Strength:
Example:
Example:
Example:
Example:
Example:
Example:
1. Which has the strongest bonds holding atoms together?
a. CH4
b. NO2
c. LiCl
d. PCl3
2. Which has the strongest forces holding molecules together?
a. H2O
b. SO2
c. CF4
d. H2
3. Why does water form droplets with high surface tension (what kind of forces does it have)?
4. Breaking bonds is ________________. Breaking forces is ________________. That is why breaking
bonds requires so much energy and changes the substance; meanwhile breaking forces only changes
the phase. (Use physical or chemical in the blanks.
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