IGCSE Chemistry
2026 - 2028
Syllabus Checklist ✅
Topic 4: Simple Molecules and Covalent Bonds
Definition of Covalent Bond
State that a covalent bond
is formed when a pair of electrons
is shared
between two atoms, leading to noble gas electronic configurations
Formation of Covalent Bonds (Simple Molecules)
Describe the formation of covalent bonds
in simple molecules, including H₂
, Cl₂
, H₂O
, CH₄
, NH₃
, and HCl
. Use dot-and-cross diagrams
to show the electronic configurations
in these and similar molecules
Describe the formation of covalent bonds
in simple molecules, including CH₃OH
, C₂H₄
, O₂
, CO₂
, and N₂
. Use dot-and-cross diagrams
to show the electronic configurations
in these and similar molecules
Properties of Simple Molecular Compounds
Describe, in terms of structure
and bonding
, the properties of simple molecular compounds
: low melting points
and boiling points
, poor electrical conductivity
Explain, in terms of structure
and bonding
, the properties of simple molecular compounds
: low melting points
and boiling points
due to weak intermolecular forces
(specific types of intermolecular forces not required), and poor electrical conductivity
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