IGCSE Chemistry
2026 - 2028
Syllabus Checklist ✅
Topic 3: Ions and Ionic Bonds
Formation of Ions
Describe the formation of positive ions
(known as cations
) and negative ions
(known as anions
)
Definition of Ionic Bond
State that an ionic bond
is a strong electrostatic attraction
between oppositely charged ions
Formation of Ionic Bonds
Describe the formation of ionic bonds
between elements from Group I
and Group VII
, including the use of dot-and-cross diagrams
Describe the formation of ionic bonds
between ions of metallic
and non-metallic elements
, including the use of dot-and-cross diagrams
Properties of Ionic Compounds
Describe the properties of ionic compounds
: high melting points
and boiling points
, good electrical conductivity
when aqueous or molten
and poor conductivity
when solid
Describe the giant lattice structure
of ionic compounds
as a regular arrangement of alternating positive
and negative ions
Explain, in terms of structure
and bonding
, the properties of ionic compounds
: high melting points
and boiling points
, good electrical conductivity
when aqueous or molten
and poor when solid
