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Properties of Period 3 elements and their oxides: AQA A‑Level Chemistry questions

Every AQA A-Level Chemistry exam question on 3.2.4 Properties of Period 3 elements and their oxides, 2016–2025, with its mark scheme and examiner’s report.

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2,301 questions

  1. Q11

    June 2025 · Paper 3

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2025 Paper 3, question 11: The melting points of some Period 3 oxides are shown. Oxide Na2O MgO Al2O3 SiO2 P4O10 SO3 Melting point / °C 920 2900 2040 1610 580 17 Which row is correct? [1

  2. Q19

    June 2025 · Paper 3

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2025 Paper 3, question 19: 0.100 mol of each of the oxides listed is added to separate 1.00 dm3 samples of water. Which oxide produces the solution with the lowest pH? [1 mark] A MgO B Al

  3. Q26

    June 2025 · Paper 3

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2025 Paper 3, question 26: Which statement is correct? [1 mark] A A minimum of 0.5 mol of water is needed to react completely with 1 mol of Na2O B A solution of hydrochloric acid containi

  4. Q30

    June 2025 · Paper 3

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2025 Paper 3, question 30: Equal amounts of three Period 3 elements are added to separate 100 cm3 samples of water. Which list is correct when the solutions formed from these elements are

  5. Q31

    June 2025 · Paper 3

    1 mark3.1.3 Bonding3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2025 Paper 3, question 31: The oxides P4O10 and SO2 both react with water to form acid molecules. Which row gives the correct shape around the central atom for each acid molecule that is

  6. Q03.1

    June 2023 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2023 Paper 1, question 03.1: Give an equation for the reaction between phosphorus and an excess of oxygen. [1 mark]

  7. Q03.2

    June 2023 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2023 Paper 1, question 03.2: Give an equation for the reaction between sulfur dioxide and water. [1 mark]

  8. Q03.3

    June 2023 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2023 Paper 1, question 03.3: Give the displayed formula for the anion formed when sulfur trioxide reacts with water. [1 mark]

  9. Q03.4

    June 2023 · Paper 1

    2 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2023 Paper 1, question 03.4: Give an equation for the reaction of magnesium with steam. State one observation made. [2 marks] Equation Observation

  10. Q03.5

    June 2023 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2023 Paper 1, question 03.5: Give an equation to show how an excess of magnesium oxide reacts with phosphoric acid (H3PO4). [1 mark]

  11. Q05.2

    June 2022 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2022 Paper 1, question 05.2: Give an equation for the reaction of aluminium oxide with sulfuric acid. [1 mark]

  12. Q05.3

    June 2022 · Paper 1

    3 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2022 Paper 1, question 05.3: Identify a reagent or test that could be used to distinguish between aqueous solutions of sulfur dioxide and sulfur trioxide with the same concentrations. State

  13. Q05.5

    June 2022 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2022 Paper 1, question 05.5: Give an equation for the reaction of phosphorus(V) oxide with sodium hydroxide solution. [1 mark]

  14. Q05.6

    June 2022 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    June 2022 Paper 1, question 05.6: Draw the displayed formula of the molecule formed when phosphorus(V) oxide reacts with water. [1 mark] DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED

  15. Q03.1

    November 2021 · Paper 1

    2 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2021 Paper 1, question 03.1: When a piece of sodium is added to 200 cm3 of water in a large beaker a vigorous reaction occurs. The temperature of the water increases by 25 oC Give an equati

  16. Q03.2

    November 2021 · Paper 1

    2 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2021 Paper 1, question 03.2: Give an equation for the reaction of phosphorus(V) oxide with water. Suggest a pH for the solution formed. [2 marks] Equation pH

  17. Q03.4

    November 2021 · Paper 1

    2 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2021 Paper 1, question 03.4: An element in Period 3 forms an oxide that is insoluble in water. This oxide reacts with sulfuric acid and with aqueous potassium hydroxide. Give the formula fo

  18. Q03.5

    November 2021 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2021 Paper 1, question 03.5: Give the formula of a hydroxide of an element in Period 3 used in medicine. [1 mark]

  19. Q03.5

    November 2020 · Paper 1

    1 mark3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2020 Paper 1, question 03.5: Phosphorus burns in air to form phosphorus(V) oxide. Give an equation for this reaction. [1 mark]

  20. Q02.1

    November 2020 · Paper 3

    2 marks3.2.4 Properties of Period 3 elements and their oxides
    The whole paper ↗
    November 2020 Paper 3, question 02.1: Sodium oxide forms a solution with a higher pH than magnesium oxide when equal amounts, in moles, of each oxide are added separately to equal volumes of water.
All 38 questions on Properties of Period 3 elements and their oxides, as a list
  1. June 2025, Paper 3, Q11 (1 mark): The melting points of some Period 3 oxides are shown. Oxide Na2O MgO Al2O3 SiO2 P4O10 SO3 Melting point / °C 920 2900 2040 1610 580 17 Which row is correct? [1
  2. June 2025, Paper 3, Q19 (1 mark): 0.100 mol of each of the oxides listed is added to separate 1.00 dm3 samples of water. Which oxide produces the solution with the lowest pH? [1 mark] A MgO B Al
  3. June 2025, Paper 3, Q26 (1 mark): Which statement is correct? [1 mark] A A minimum of 0.5 mol of water is needed to react completely with 1 mol of Na2O B A solution of hydrochloric acid containi
  4. June 2025, Paper 3, Q30 (1 mark): Equal amounts of three Period 3 elements are added to separate 100 cm3 samples of water. Which list is correct when the solutions formed from these elements are
  5. June 2025, Paper 3, Q31 (1 mark): The oxides P4O10 and SO2 both react with water to form acid molecules. Which row gives the correct shape around the central atom for each acid molecule that is
  6. June 2023, Paper 1, Q03.1 (1 mark): Give an equation for the reaction between phosphorus and an excess of oxygen. [1 mark]
  7. June 2023, Paper 1, Q03.2 (1 mark): Give an equation for the reaction between sulfur dioxide and water. [1 mark]
  8. June 2023, Paper 1, Q03.3 (1 mark): Give the displayed formula for the anion formed when sulfur trioxide reacts with water. [1 mark]
  9. June 2023, Paper 1, Q03.4 (2 marks): Give an equation for the reaction of magnesium with steam. State one observation made. [2 marks] Equation Observation
  10. June 2023, Paper 1, Q03.5 (1 mark): Give an equation to show how an excess of magnesium oxide reacts with phosphoric acid (H3PO4). [1 mark]
  11. June 2022, Paper 1, Q05.2 (1 mark): Give an equation for the reaction of aluminium oxide with sulfuric acid. [1 mark]
  12. June 2022, Paper 1, Q05.3 (3 marks): Identify a reagent or test that could be used to distinguish between aqueous solutions of sulfur dioxide and sulfur trioxide with the same concentrations. State
  13. June 2022, Paper 1, Q05.5 (1 mark): Give an equation for the reaction of phosphorus(V) oxide with sodium hydroxide solution. [1 mark]
  14. June 2022, Paper 1, Q05.6 (1 mark): Draw the displayed formula of the molecule formed when phosphorus(V) oxide reacts with water. [1 mark] DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED
  15. November 2021, Paper 1, Q03.1 (2 marks): When a piece of sodium is added to 200 cm3 of water in a large beaker a vigorous reaction occurs. The temperature of the water increases by 25 oC Give an equati
  16. November 2021, Paper 1, Q03.2 (2 marks): Give an equation for the reaction of phosphorus(V) oxide with water. Suggest a pH for the solution formed. [2 marks] Equation pH
  17. November 2021, Paper 1, Q03.4 (2 marks): An element in Period 3 forms an oxide that is insoluble in water. This oxide reacts with sulfuric acid and with aqueous potassium hydroxide. Give the formula fo
  18. November 2021, Paper 1, Q03.5 (1 mark): Give the formula of a hydroxide of an element in Period 3 used in medicine. [1 mark]
  19. November 2020, Paper 1, Q03.5 (1 mark): Phosphorus burns in air to form phosphorus(V) oxide. Give an equation for this reaction. [1 mark]
  20. November 2020, Paper 3, Q02.1 (2 marks): Sodium oxide forms a solution with a higher pH than magnesium oxide when equal amounts, in moles, of each oxide are added separately to equal volumes of water.
  21. November 2020, Paper 3, Q02.2 (1 mark): Give an equation for the reaction between phosphorus(V) oxide and water. [1 mark]
  22. June 2019, Paper 1, Q03.4 (1 mark): The equations for two reactions of arsenic(III) oxide are shown. As2O3 + 6 HCl → 2 AsCl3 + 3 H2O As2O3 + 6 NaOH → 2 Na3AsO3 + 3 H2O Name the property of arsenic
  23. June 2019, Paper 3, Q01.2 (2 marks): The gas SO2 is a pollutant. State the property of SO2 that causes pollution when it enters rivers. Give an equation to show the reaction of SO2 with water. [2 m
  24. June 2018, Paper 1, Q05.4 (1 mark): Identify the oxide that could react with water to form a solution with pH = 2 Tick () one box. [1 mark] Al2O3 Na2O SiO2 SO2
  25. June 2018, Paper 3, Q02.1 (2 marks): Give an equation and two observations made for the reaction that occurs when sodium is heated in oxygen. [2 marks] Equation Observation 1 Observation 2
  26. June 2018, Paper 3, Q02.2 (2 marks): Give an equation and one observation made for the reaction that occurs when phosphorus is heated in oxygen. [2 marks] Equation Observation
  27. June 2018, Paper 3, Q02.3 (2 marks): The melting points of the highest oxides of the elements sodium to sulfur are shown in Table 2. Table 2 Highest oxide of sodium magnesium aluminium silicon phos
  28. June 2018, Paper 3, Q02.4 (3 marks): Explain why the melting point of the oxide of silicon is much higher than that of the highest oxide of phosphorus. [3 marks]
  29. June 2018, Paper 3, Q02.5 (3 marks): A sample of the highest oxide of phosphorus was prepared in a laboratory. Describe a method for determining the melting point of the sample. State how the resul
  30. June 2018, Paper 3, Q25 (1 mark): Which element forms an ionic oxide that reacts with strong alkalis? [1 mark] A Aluminium B Magnesium C Sodium D Sulfur
  31. June 2017, Paper 1, Q06.1 (1 mark): Write an equation for the reaction of phosphorus with an excess of oxygen. [1 mark
  32. June 2017, Paper 1, Q06.2 (3 marks): Describe a test you could carry out in a test tube to distinguish between sodium oxide and the product of the reaction in Question 6.1 [3 marks
  33. June 2017, Paper 1, Q06.5 (1 mark): Write an equation for the reaction of sulfur trioxide with potassium hydroxide solution. [1 mark]
  34. June 2017, Paper 1, Q06.6 (1 mark): Write an equation for the reaction of an excess of magnesium oxide with phosphoric acid. [1 mark]
  35. June 2017, Paper 1, Q06.7 (1 mark): Draw the displayed formula of the undissociated acid formed when sulfur dioxide reacts with water. [1 mark]
  36. June 2017, AS Paper 1, Q06.2 (2 marks): Suggest two reasons why the sulfur dioxide by-product of this process is remove from the exhaust gases. [2 mark Reason 1 Reason 2
  37. Specimen, Paper 1, Q02.3 (2 marks): 5
  38. Specimen, Paper 1, Q02.4 (1 mark): 6

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