CAIE IGCSE Chemistry Ionic Bond Formation in Compounds
Practise constructing dot-and-cross diagrams for metal and non-metal ions, tracking transferred electrons and assigning charges from completed shells.
- Syllabus
- 2026–2028
- Course
- Chemistry 0620
Exam points
- track electrons transferred from metal atoms to non-metal atoms to form complete outer shells
- draw bracketed dot-and-cross ions with electron origins distinguished and no shared pairs
- show each ion's charge and use the number of transferred electrons to obtain the correct ratio
2.4.6—Formation of ionic bonds between ions question 1
Sulfur is a Group VI element.
Sulfur reacts with magnesium to form magnesium sulfide, MgS, an ionic compound.
Complete the dot-and-cross diagram in Fig. 5.1 of the ions in magnesium sulfide.
Give the charges on the ions.
Fig. 5.1
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