Ion and ionic bonds: past paper questions

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• Question 4May/June 2026, paper 11Multiple choice1 markHas a diagram

  The diagram shows the relative mass and the relative charge of two particles present in atoms and ions. Which of these particles are present in a hydrogen atom and in a hydrogen ion?

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• Question 5Oct/Nov 2025, paper 11Multiple choice1 mark

  Metals lose electrons when they combine with a non-metal to form an ionic compound. Calcium combines with hydrogen to form the ionic compound calcium hydride, ${\mathrm{C}\mathrm{a}\mathrm{H}}_2$. How many electrons are there in the outer shell of each of the two hydride ions in ${\mathrm{C}\mathrm{a}\mathrm{H}}_2$?

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• Question 7Oct/Nov 2024, paper 11Multiple choice1 mark

  Chrome alum is a salt that contains two different cations and one anion. The ions present in chrome alum are ${\text{K}}^{+}$, ${\text{Cr}}^{3+}$ and ${\text{SO}}_4^{2-}$. What is the formula of the salt?

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• Question 5May/June 2026, paper 11Multiple choice1 markHas a diagram

  Which diagram represents magnesium oxide?

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• Question 4Oct/Nov 2025, paper 12Multiple choice1 mark

  In which ionic compound do all the ions have the same electronic configuration?

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• Question 5Oct/Nov 2024, paper 12Multiple choice1 mark

  Which statement about electrical conductivity is correct?

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• Question 23Oct/Nov 2023, paper 11Multiple choice1 mark

  The characteristic properties of elements change from left to right across Period 2 of the Periodic Table. On the left of the period, the charge on the ion formed by an element is: 1 the same as the group number 2 negative. Which statements are correct?

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• Question 4May/June 2026, paper 12Multiple choice1 mark

  Magnesium oxide has a high melting point. It is used to line the inside of furnaces that operate at high temperatures. Why does magnesium oxide have a high melting point?

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• Question 5Oct/Nov 2025, paper 12Multiple choice1 mark

  Which ion has a positive charge?

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• Question 7May/June 2024, paper 12Multiple choice1 mark

  What is the formula of zinc oxide?

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• Question 5Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  Which diagram shows a section of the ionic lattice of sodium chloride?

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• Question 2May/June 2026, paper 21Structured12 marks

  Sodium azide, ${\mathrm{N}\mathrm{a}\mathrm{N}}_3$, decomposes when heated to make sodium and nitrogen. $$2{\mathrm{N}\mathrm{a}\mathrm{N}}_3(\mathrm{s})\to 2\mathrm{N}\mathrm{a}(\mathrm{s})+3{\mathrm{N}}_2(\mathrm{g})$$ A sample of $13.6\mathrm{g}$ of sodium azide is fully decomposed.

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• Question 21Oct/Nov 2025, paper 12Multiple choice1 mark

  The atomic number of element X is 12. What is the formula of the chloride of X?

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• Question 4May/June 2024, paper 21Structured9 marks

  Potassium iodide, $\mathrm{K}\mathrm{I}$, is an ionic solid composed of a lattice of potassium ions and iodide ions. Explain why potassium iodide has a high melting point.

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• Question 4May/June 2023, paper 11Multiple choice1 mark

  Some statements about the bonding in magnesium chloride are listed. 1 Each magnesium atom donates two electrons; each chlorine atom accepts one electron. 2 Chlorine forms an ion with a $2-$ charge.

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• Question 4Oct/Nov 2025, paper 21Structured9 marks

  Fluorine, chlorine, bromine and iodine are elements in Group VII. Bromine has a low boiling point. It is a liquid at room temperature.

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• Question 4May/June 2024, paper 22Structured9 marks

  Calcium bromide, ${\mathrm{C}\mathrm{a}\mathrm{B}\mathrm{r}}_2$, is an ionic solid composed of a lattice of calcium ions and bromide ions. Explain why calcium bromide has a high melting point.

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• Question 4May/June 2023, paper 12Multiple choice1 mark

  Element X and element Y react together to form a compound. The electronic configurations of X and Y are $\mathrm{X}=2,8,3$ and $\mathrm{Y}=2,6$. Which row shows the electron transfer that takes place and the type of compound formed?

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• Question 9Oct/Nov 2025, paper 21Structured10 marks

  Anhydrous copper(II) sulfate is a white solid. State the meaning of the term anhydrous.

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• Question 4May/June 2023, paper 21Structured9 marks

  This question is about compounds that contain phosphorus. The formula for a phosphide ion can be written as ${}_{15}^{31}{\mathrm{P}}^{3-}$. Complete Table 4.1 to show the number of particles in this phosphide ion.

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• Question 4Oct/Nov 2025, paper 22Structured8 marks

  Fluorine, chlorine, bromine and iodine are elements in Group VII. Fluorine has a low boiling point. It is a gas at room temperature.

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• Question 4May/June 2023, paper 22Structured9 marks

  This question is about compounds that contain magnesium and nitrogen. The formula for a nitride ion can be written as ${}_7^{15}{\mathrm{N}}^{3-}$. Complete Table 4.1 to show the number of particles in this nitride ion.

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• Question 9Oct/Nov 2025, paper 22Structured9 marks

  Hydrated zinc chloride is a white solid. State the meaning of the term hydrated.

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• Question 6May/June 2025, paper 11Multiple choice1 markHas a diagram

  Magnesium reacts with oxygen to form magnesium oxide. $$2\mathrm{M}\mathrm{g}+{\mathrm{O}}_2\to 2\mathrm{M}\mathrm{g}\mathrm{O}$$ Which row is correct?

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• Question 7May/June 2025, paper 11Multiple choice1 mark

  Which statement about solid calcium chloride is correct?

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• Question 7May/June 2025, paper 12Multiple choice1 mark

  Which statement about magnesium oxide is correct?

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