I
IGCSE REVISION Chapter 3
The following key words and explanations must be memorized.
You should be able to explain some of them with examples too.
The words in bold need a definition. Look up the definition in the glossary of your
revision guide or in your textbook. These must be memorized word for word.
Section/ Detail
Chapter
A.3
Covalent Bond
Be able to draw the covalent bonds formed between
the following molecules
Hydrogen H2
Hydrogen Chloride HCl
Chlorine Cl2
Water H2O
Ammonia NH3
Oxygen O2
Carbon Dioxide CO2
Nitrogen N2
Be able to draw the dot cross diagram for each of the
above
Be able to represent the bonds with lines for single,
double and triple bonds for each of the above
Ionic Bonding
Ions
Cations
Anions
Explain how ionic bonds form and why.
What is the importance of noble gas structure?
complete
learned
Be able to draw
 full ionic bond diagrams
 dot cross diagrams
 electronic structure diagrams
for any ionic compound formed between a metal and a
non metal eg NaCl, MgO, LiO, KN, CaCl2, Al2O3
Metallic Bonding
Recap the properties of metals
Describe their structure
Link their structure to their properties
Ie: high melting point
Density
Conduction of electricity
Be able to explain why metals with more electrons in
their outermost shell have a stronger metallic bond and
therefore higher melting point see me if you need
further explanation