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CAIE IGCSE Chemistry: Group Number & Ion Charge Question Bank

Practise linking group number to ion charge, ionic formulae and electron transfer in compounds formed by metals and non-metals.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • use ion charges to choose formulae and simple ratios in ionic compounds
  • link Group I or Group VII position to electron loss or gain during ion formation

8.1.3—Relationship between group number and question 1

[Maximum number: 1]

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

Table for Question 8.1.3—Relationship between group number and 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:

forms an ion with a 2-charge

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