Simple molecules and covalent bonds: past paper questions

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• Question 5May/June 2026, paper 12Multiple choice1 mark

  What is the total number of shared electrons in one molecule of ammonia?

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

  Strontium nitrate is an ionic compound. Cyclohexane is a covalent compound. Which row describes a property of each compound?

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• Question 6Oct/Nov 2024, paper 11Multiple choice1 mark

  Nitrogen monoxide, NO, is a simple molecular compound. Which row shows the properties of nitrogen monoxide?

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• Question 5Oct/Nov 2023, paper 11Multiple choice1 markHas a diagram

  Fluorine, ${\text{F}}_2$, is in the same group of the Periodic Table as chlorine, ${\text{Cl}}_2$. Which diagram represents the arrangement of the outer-shell electrons in a molecule of fluorine?

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• Question 7May/June 2026, paper 13Multiple choice1 mark

  The formula of ammonia is ${\mathrm{N}\mathrm{H}}_3$. Which statement about a molecule of ammonia is correct?

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• Question 6Oct/Nov 2025, paper 11Multiple choice1 mark

  Which element forms covalent bonds with hydrogen?

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• Question 7Oct/Nov 2024, paper 12Multiple choice1 markHas a diagram

  Covalent bonds are formed when electrons are ......1...... . Most covalent compounds have ......2......

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• Question 6Oct/Nov 2023, paper 12Multiple choice1 markHas a diagram

  Which row describes the properties of a simple molecular substance?

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• Question 2May/June 2026, paper 31Structured11 marksHas a diagram

  Table 2.1 shows some properties of the halogens. Table 2.1 Use the information in Table 2.1 to answer the following questions. Predict the melting point of iodine.

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• Question 8Oct/Nov 2025, paper 12Multiple choice1 mark

  Which properties are typical of simple molecules?

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• Question 6Oct/Nov 2024, paper 13Multiple choice1 markHas a diagram

  Which row gives the number of covalent bonds in one molecule of ammonia and in one molecule of hydrogen chloride?

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• Question 5Oct/Nov 2023, paper 13Multiple choice1 mark

  Which statement about ammonia is correct?

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• Question 2May/June 2026, paper 32Structured10 marksHas a diagram

  Table 2.1 shows some properties of the Group I elements. Table 2.1 Use the information in Table 2.1 to answer the following questions. Predict the melting point of sodium.

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• Question 4Oct/Nov 2025, paper 13Multiple choice1 markHas a diagram

  The electronic structures of two atoms, P and Q, are shown. P and Q combine together to form a compound. What is the type of bonding in the compound, and what is the formula of the compound?

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• Question 5Oct/Nov 2024, paper 21Multiple choice1 mark

  Which statement about nitrogen molecules and ethene molecules is correct?

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• Question 6Oct/Nov 2023, paper 22Multiple choice1 mark

  Which substance has the lowest melting point?

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• Question 2May/June 2026, paper 33Structured8 marksHas a diagram

  The halogens are in Group VII of the Periodic Table. Halogens exist as diatomic molecules. Explain what is meant by the term diatomic.

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• Question 8Oct/Nov 2025, paper 13Multiple choice1 markHas a diagram

  Which row describes simple molecular compounds?

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• Question 6Oct/Nov 2024, paper 21Multiple choice1 markHas a diagram

  Sulfur is a simple molecule with the formula ${\text{S}}_8$. Which row describes and explains the melting point of sulfur?

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• Question 34Oct/Nov 2023, paper 22Multiple choice1 mark

  What is the total number of covalent bonds in a molecule of butane, ${\mathrm{C}}_4{\mathrm{H}}_{10}$?

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• Question 3May/June 2026, paper 41Structured10 marksHas a diagram

  This question is about structure and bonding. Magnesium fluoride is an ionic compound. In Figure 3.1, complete the dot-and-cross diagrams to show the bonding in magnesium fluoride.

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• Question 7Oct/Nov 2025, paper 23Multiple choice1 markHas a diagram

  Which diagram shows the outer shell electron arrangement for a molecule of methanol, ${\text{CH}}_3\text{OH}$?

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• Question 6Oct/Nov 2024, paper 22Multiple choice1 mark

  Which diagram shows the covalent bonding in a molecule of carbon dioxide?

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• Question 6May/June 2023, paper 11Multiple choice1 markHas a diagram

  Which row describes the formation of single covalent bonds in methane?

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• Question 2May/June 2026, paper 42Structured11 marks

  Bonding is the attraction between particles. The particles can be atoms, molecules, ions or electrons. Bonding can be strong or weak.

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

  Which substances contain one or more shared pairs of electrons?

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• Question 7Oct/Nov 2024, paper 22Multiple choice1 markHas a diagram

  The bonding, structure and melting point of sodium chloride and sulfur dichloride are shown.

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• Question 5May/June 2023, paper 12Multiple choice1 markHas a diagram

  Ammonia, ${\mathrm{N}\mathrm{H}}_3$, is a covalent molecule. Which diagram shows the outer-shell electron arrangement in a molecule of ammonia?

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• Question 3May/June 2026, paper 43Structured9 marksHas a diagram

  This question is about structure and bonding. Sodium oxide is an ionic compound. Complete the dot-and-cross diagrams in Figure 3.1 to show the bonding in sodium oxide.

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• Question 8May/June 2025, paper 12Multiple choice1 mark

  In the molecules ${\mathrm{C}\mathrm{H}}_4$, $\mathrm{H}\mathrm{C}\mathrm{l}$ and ${\mathrm{H}}_2\mathrm{O}$, which atoms use all of their outer shell electrons in bonding?

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