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CAIE IGCSE Chemistry 3.1.6 Deduce the formula of an ionic

Practise using ion charges, group patterns and diagrams to deduce formulae for ionic compounds, acids and complex ions.

Syllabus
2026–2028
Course
Chemistry 0620

Exam points

  • deduce ion or compound formulae from charge information, including SO3^2- and zincate ions

3.1.6—Deduce the formula of an ionic question 1

[Maximum number: 1]

Fluorine is a Group VII element. Fluorine forms compounds with metals and non-metals.

Tetrafluoromethane and lead(II) fluoride are fluorides of Group IV elements. Some properties of tetrafluoromethane and lead(II) fluoride are shown in the table.

Table for Question 3.1.6—Deduce the formula of an ionic question 1 — CAIE IGCSE Chemistry

What is the formula of lead(II) fluoride?

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