CAIE IGCSE Chemistry 1.1.2 Structures of solids, liquids and

Cambridge IGCSE Chemistry 0620 syllabus for exams in 2026, 2027 and 20282026–2028

Practise particle models for solids, liquids and gases by completing tables and comparing separation, arrangement and motion.

How this is tested

complete tables for particle separation, arrangement and motion in each state
compare solid and gas particles using close or far apart, regular or random, vibrate or move
explain Brownian motion as random movement caused by smaller particles hitting larger ones

[Maximum number: 1]

Sodium chloride is a liquid at $900^{\circ} \mathrm{C}$ .
Which row describes the arrangement and the motion of the particles in sodium chloride at $900^{\circ} \mathrm{C}$ ?

arrangement

of particles

motion

of particles

regular

vibrate about a fixed point

regular

move randomly

random

vibrate about a fixed point

random

move randomly

How this is tested

Question 1