What this tests
Syllabus point 8.2 — Group I properties, in The Periodic Table. Difficulty medium (estimated from the question's demands, not a Cambridge rating).
Also set in
The same question, as Cambridge printed it in other papers.
Cambridge IGCSE Chemistry 0620 · 8.2 Group I properties
March 2023 · Paper 22 · Question 23
One real Cambridge question from The Periodic Table, with the official answer. Cambridge has printed this question 2 times.