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CAIE IGCSE Chemistry Chlorine Bromine and Iodine Trends

Practise describing chlorine, bromine and iodine as diatomic non-metals and applying trends in density, colour, state and reactivity down Group VII.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • identify halogens as diatomic non-metals and use room-temperature state or colour data
  • state that density increases and colour generally darkens down Group VII
  • state that reactivity decreases down the group and use this to rank unfamiliar halogens

8.3.1—Group VII halogens, chlorine, bromine question 1

[Maximum number: 1]

The symbols of the elements of Period 3 of the Periodic Table are shown.

Table for Question 8.3.1—Group VII halogens, chlorine, bromine question 1 — CAIE IGCSE Chemistry

Answer the following questions about these elements.
Each element may be used once, more than once or not at all.
Write the symbol of an element which:

exists as diatomic molecules

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