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CAIE IGCSE Chemistry Giant Ionic Lattice Structure

CAIE IGCSE Chemistry Giant Ionic Lattice Structure
Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise describing giant ionic lattices as regular repeating arrangements of alternating positive and negative ions and interpreting lattice diagrams.

How this is tested

  • describe a giant ionic lattice as a regular repeating arrangement of oppositely charged ions
  • complete or interpret a lattice diagram by alternating cations and anions throughout the pattern
  • identify a solid ionic substance as a giant lattice rather than a molecule or collection of atoms

Question 5

[Maximum number: 1]

Which statement about solid magnesium oxide is correct?

A

It is a giant structure made up of magnesium and oxygen atoms bonded covalently.

B

It is an electrical conductor with mobile magnesium ions and oxygen ions.

C

Magnesium loses electrons and these electrons move freely through a lattice.

D

Oxygen ions and magnesium ions are attracted to each other in a giant lattice.