Chapter 7: Chemical Bonding
A) Ionic Bond
1. Use Lewis dot structure to represent the formation of following ionic compounds:
Example: Formation of NaCl =
a.) KF
b.) Na2O
c.) Li3N
d.) MgO
e.) CaCl2
f.) Al2O3
2. Predict the chemical formula of following compound formed by:
a.) X element (Group IA) and Y element (Group VA)
b.) A element (Group IIA) and B element (Group VIIA)
c.) M element (Group IIIA) and N element (Group VIA)
B) Covalent Bond
1. a) Draw the Lewis dot structure of the following molecules.
b) Predict the shape of the molecules.
c) Determine the polarity of the molecules. (is it a polar molecule or non-polar molecule?)
i) CH4
vi) O2
ii) NH3
iii) H2O
vii) PCl3
viii) H2S
iv) SiCl4
v) HCl
ix) CH2O
x) HCN
2. Draw the Lewis electron dot structures for the following molecule and ion, showing any coordinate
covalent bonds present.
a) Al2Cl6
b) SO2
c) H3O+
3. Draw the Lewis electron dot structure for the following molecules which do not obey the octet rule.
a) BF3
b) BeCl2
c) SF6
C) Intermolecular Forces
1. Identify the main intermolecular forces of following molecules:
Choose between  van der Waals (Dipole-Dipole Attraction)
 van der Waals (London Dispersion Force)
 hydrogen bond
i) H2
vi) CH3Cl
ii) HI
iii) H2O
vii) BH3
iv) H2S
v) CO2
viii) NH3
2. Below are some wrong statements regarding hydrogen bond, correct the mistakes.
a.) Hydrogen bond is one type of covalent bond.
b.) There are two hydrogen bonds within each water molecules.
D) Types of Crystalline Structure and their Properties.
1. Complete the table below:
Substances
sodium chloride
Type of Crystal
ionic crystal
Component Particles
Na+ and Cl- ions
Force between Particles
ionic bond
diamond
atomic crystal
C atoms
covalent bond
hydrogen gas
molecular crystal
H2 molecules
van der Waals
hydrogen fluoride
molecular crystal
HF molecules
hydrogen bond
sodium powder
metallic crystal
Na+ ions and electrons
metallic bond
silicon dioxide
magnesium cube
calcium oxide
ammonia
dry ice
aluminium foil
distilled water
silicon
potassium sulfate
aluminium chloride
2. Given following substances: CCl4, NaOH, Na2O2, H2O2, (NH4)2S, CO2, NaCl, C2H2, SiO2
a.) An ionic compound having only ionic bond is ______________
b.) An ionic compound having ionic bond as well as polar covalent bond is ______________
c.) An ionic compound having ionic bond, polar covalent bond and coordinate bond is ____________
d.) An ionic compound having ionic bond and non-polar covalent bond is ____________
e.) A non-polar molecule having only polar covalent bond is ___________ (2 ans)
f.) A non-polar molecule having non-polar covalent bond and polar covalent bond is ____________
g.) A polar molecule having non-polar covalent bond and polar covalent bond is _____________
h.) An atomic crystal having only covalent bond is __________