0653.C2.3.03 — Describe the formation of ionic bonds between elements from Group I and Group VII, including the use of dot-and-cross diagrams: past paper questions
Real questions on 0653.c2.3.03 — describe the formation of ionic bonds between elements from group i and group vii, including the use of dot-and-cross diagrams
The newest 8 of 8 written questions. Open one to see it on the real paper.
- 0653/43 · October/November 2025 · Q4c[3]
Fig. 4.2 shows an atom of magnesium and an atom of chlorine. Mg Cl magnesium atom chlorine atom Fig. 4.2 Complete the dot-and-cross diagram in Fig. 4.3 to show the ionic bonding in magnesium chloride, MgCl 2 . Show only the outer-shell electrons and include the charges on the ions. Cl Mg Cl
See it on the paper → - 0653/33 · May/June 2025 · Q4b[2]
Lithium fluoride contains lithium ions, Li + , and fluoride ions, F – . – + Li F Fig. 4.1 shows the dot-and-cross diagram for lithium fluoride. lithium fluorine Use Fig. 4.1 to describe what happens when a lithium atom and a fluorine atom form ions. Fig. 4.1
See it on the paper → - 0653/42 · May/June 2025 · Q4a[1]
Tick (3) all the boxes that are properties of sodium fluoride. high boiling point insoluble in water
See it on the paper → - 0653/42 · May/June 2025 · Q4b[3]
Complete the dot-and-cross diagram in Fig. 4.1 to show the outer-shell electrons for each ion in sodium fluoride. Include the charge on each ion. Na F
See it on the paper → - 0653/32 · February/March 2025 · Q6g[3]
Draw one straight line from each description to the correct substance. description substance chlorine salt that contains ionic bonds dilute sulfuric acid compound with a pH less than 7 hydrogen lead Group VII element lead( II ) bromide
See it on the paper → - 0653/21 · October/November 2024 · Q16[1]
Which row describes the formation of magnesium chloride and the strength of the attraction between its ions?
See it on the paper → - 0653/42 · February/March 2024 · Q2b[2]
Nitrogen forms a molecule with the formula N 2 . Complete Fig. 2.1 to show the dot-and-cross diagram for a molecule of nitrogen. Show the outer shell electrons only. N N Fig. 2.1
See it on the paper → - 0653/32 · February/March 2022 · Q2c(ii)[2]
Complete the dot-and-cross diagram in Fig. 2.3 to show all of the outer shell electrons in a molecule of water. H O Fig. 2.3 H
See it on the paper →
What examiners said
Some candidates answered this question correctly, describing how an electron goes from the lithium atom to the fluorine atom. A common error was using the terms atoms and ions for the transfer instead of electrons. Any references to sharing electrons, as in covalent bonding, were rejected.
— Examiner report, May/June 2025, 0653/33 Q4(b) (Cambridge)
Many candidates knew that a property of sodium fluoride is its high boiling point, but many also placed ticks in additional incorrect boxes.
— Examiner report, May/June 2025, 0653/42 Q4(a) (Cambridge)
Most candidates gained partial credit for stating the charge of the ions. Some candidates drew an additional outer shell with 8 electrons on each ion, often with some indication that one electron had been donated from Na to F.
— Examiner report, May/June 2025, 0653/42 Q4(b) (Cambridge)
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