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A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes: AQA GCSE Combined Science questions

Every AQA GCSE Combined Science exam question on 5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, 2018–2025, with its mark scheme and examiner’s report.

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3,069 questions

  1. Q03.1

    June 2025 · Chemistry Paper 1 Higher

    2 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 03.1: Figure 3 shows the results of the alpha particle scattering experiment. In the experiment, alpha particles were fired at gold foil. Alpha particles are positive

  2. Q03.2

    June 2025 · Chemistry Paper 1 Higher

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 03.2: Why is particle X not an atom? Answer in terms of subatomic particles. [1 mark]

  3. Q03.3

    June 2025 · Chemistry Paper 1 Higher

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    Mark scheme (PDF)
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 03.3: Which is the correct representation of particle X? Use the periodic table. [1 mark] Tick () one box. 79 35Br+ 79 35Br− 79 35Se+ 79 35Se−

  4. Q06.5

    June 2025 · Chemistry Paper 1 Higher

    4 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes5.3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 06.5: Iron reacts with steam (H2O) to produce an oxide of iron and hydrogen gas. 0.120 moles of iron reacts with 0.160 moles of steam. Determine the balanced equation

  5. Q07.2

    June 2025 · Chemistry Paper 1 Higher

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes5.2.1 Chemical bonds, ionic, covalent and metallic
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 07.2: Aluminium sulfate consists of the ions: • Al3+ • SO42– What is the formula of aluminium sulfate? [1 mark]

  6. Q07.3

    June 2025 · Chemistry Paper 1 Higher

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes5.2.1 Chemical bonds, ionic, covalent and metallic
    The whole paper ↗
    June 2025 Chemistry Paper 1 Higher, question 07.3: Metals have metallic bonding. Suggest one reason why aluminium metal conducts electricity better than sodium metal. [1 mark]

  7. Q01.1

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.1: In an early model, scientists thought the atom was a tiny sphere that could not be divided. Figure 1 represents this early model of the atom. Figure 1 The disco

  8. Q01.2

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.2: In a later model of the atom, most of the mass was concentrated in the centre of the atom. What is the name of the centre of an atom? [1 mark]

  9. Q01.3

    June 2025 · Chemistry Paper 1 Foundation

    2 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.3: Atoms contain three types of subatomic particle. Draw one line from each subatomic particle to the relative charge of the particle. [2 marks]

  10. Q01.4

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.4: What is meant by the ‘atomic number of an atom’? [1 mark] Tick () one box. The number of neutrons only The number of protons only The number of neutrons + the

  11. Q01.5

    June 2025 · Chemistry Paper 1 Foundation

    3 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.5: Table 1 shows information about two isotopes of an element. Table 1 Mass number Percentage (%) abundance Isotope A 10 19.7 Isotope B 11 80.3 Calculate the relat

  12. Q01.6

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 01.6: An oxygen atom has eight electrons. Complete Figure 2 to show the electronic structure of an oxygen atom. [1 mark] Figure 2

  13. Q02.1

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 02.1: What is the chemical symbol of lithium? Use the periodic table. [1 mark]

  14. Q02.3

    June 2025 · Chemistry Paper 1 Foundation

    3 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes5.2.2 How bonding and structure are related to the properties of substances
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 02.3: Lithium reacts with fluorine to produce lithium fluoride. Draw one line from each substance to the particle diagram that represents the substance. [3 marks]

  15. Q02.8

    June 2025 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2025 Chemistry Paper 1 Foundation, question 02.8: Lithium and nitrogen form a compound with the formula Li3N Complete the sentence. Choose the answer from the box. [1 mark] nitrate nitride nitrogen The name of

  16. Q03.2

    June 2025 · Chemistry Paper 2 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    Mark scheme (PDF)
    The whole paper ↗
    June 2025 Chemistry Paper 2 Foundation, question 03.2: Glycerol has the formula C3H8O3 How many atoms are there in one molecule of glycerol? [1 mark] Tick () one box. 3 8 11 14

  17. Q02.3

    June 2024 · Chemistry Paper 1 Higher

    2 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes5.4.2 Reactions of acids
    The whole paper ↗
    June 2024 Chemistry Paper 1 Higher, question 02.3: Beaker N contained copper sulfate solution. Describe how the student could produce copper sulfate crystals from the copper sulfate solution in beaker N. [2 mark

  18. Q01.2

    June 2024 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2024 Chemistry Paper 1 Foundation, question 01.2: A potassium atom is very small. What is the radius of a potassium atom? [1 mark] Tick () one box. 0.2 cm 0.2 mm 0.2 nm

  19. Q01.3

    June 2024 · Chemistry Paper 1 Foundation

    1 mark5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2024 Chemistry Paper 1 Foundation, question 01.3: What name is given to the number of protons in an atom? [1 mark] Tick () one box. Atomic number Group number Mass number

  20. Q01.4

    June 2024 · Chemistry Paper 1 Foundation

    2 marks5.1.1 A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes
    The whole paper ↗
    June 2024 Chemistry Paper 1 Foundation, question 01.4: Table 1 shows the name and the relative charge of the particles in a potassium atom. Table 1 Name of particle Relative charge Proton 0 Electron –1 Complete Tabl
All 111 questions on A simple model of the atom, symbols, relative atomic mass, electronic charge and isotopes, as a list
  1. June 2025, Chemistry Paper 1 Higher, Q03.1 (2 marks): Figure 3 shows the results of the alpha particle scattering experiment. In the experiment, alpha particles were fired at gold foil. Alpha particles are positive
  2. June 2025, Chemistry Paper 1 Higher, Q03.2 (1 mark): Why is particle X not an atom? Answer in terms of subatomic particles. [1 mark]
  3. June 2025, Chemistry Paper 1 Higher, Q03.3 (1 mark): Which is the correct representation of particle X? Use the periodic table. [1 mark] Tick () one box. 79 35Br+ 79 35Br− 79 35Se+ 79 35Se−
  4. June 2025, Chemistry Paper 1 Higher, Q06.5 (4 marks): Iron reacts with steam (H2O) to produce an oxide of iron and hydrogen gas. 0.120 moles of iron reacts with 0.160 moles of steam. Determine the balanced equation
  5. June 2025, Chemistry Paper 1 Higher, Q07.2 (1 mark): Aluminium sulfate consists of the ions: • Al3+ • SO42– What is the formula of aluminium sulfate? [1 mark]
  6. June 2025, Chemistry Paper 1 Higher, Q07.3 (1 mark): Metals have metallic bonding. Suggest one reason why aluminium metal conducts electricity better than sodium metal. [1 mark]
  7. June 2025, Chemistry Paper 1 Foundation, Q01.1 (1 mark): In an early model, scientists thought the atom was a tiny sphere that could not be divided. Figure 1 represents this early model of the atom. Figure 1 The disco
  8. June 2025, Chemistry Paper 1 Foundation, Q01.2 (1 mark): In a later model of the atom, most of the mass was concentrated in the centre of the atom. What is the name of the centre of an atom? [1 mark]
  9. June 2025, Chemistry Paper 1 Foundation, Q01.3 (2 marks): Atoms contain three types of subatomic particle. Draw one line from each subatomic particle to the relative charge of the particle. [2 marks]
  10. June 2025, Chemistry Paper 1 Foundation, Q01.4 (1 mark): What is meant by the ‘atomic number of an atom’? [1 mark] Tick () one box. The number of neutrons only The number of protons only The number of neutrons + the
  11. June 2025, Chemistry Paper 1 Foundation, Q01.5 (3 marks): Table 1 shows information about two isotopes of an element. Table 1 Mass number Percentage (%) abundance Isotope A 10 19.7 Isotope B 11 80.3 Calculate the relat
  12. June 2025, Chemistry Paper 1 Foundation, Q01.6 (1 mark): An oxygen atom has eight electrons. Complete Figure 2 to show the electronic structure of an oxygen atom. [1 mark] Figure 2
  13. June 2025, Chemistry Paper 1 Foundation, Q02.1 (1 mark): What is the chemical symbol of lithium? Use the periodic table. [1 mark]
  14. June 2025, Chemistry Paper 1 Foundation, Q02.3 (3 marks): Lithium reacts with fluorine to produce lithium fluoride. Draw one line from each substance to the particle diagram that represents the substance. [3 marks]
  15. June 2025, Chemistry Paper 1 Foundation, Q02.8 (1 mark): Lithium and nitrogen form a compound with the formula Li3N Complete the sentence. Choose the answer from the box. [1 mark] nitrate nitride nitrogen The name of
  16. June 2025, Chemistry Paper 2 Foundation, Q03.2 (1 mark): Glycerol has the formula C3H8O3 How many atoms are there in one molecule of glycerol? [1 mark] Tick () one box. 3 8 11 14
  17. June 2024, Chemistry Paper 1 Higher, Q02.3 (2 marks): Beaker N contained copper sulfate solution. Describe how the student could produce copper sulfate crystals from the copper sulfate solution in beaker N. [2 mark
  18. June 2024, Chemistry Paper 1 Foundation, Q01.2 (1 mark): A potassium atom is very small. What is the radius of a potassium atom? [1 mark] Tick () one box. 0.2 cm 0.2 mm 0.2 nm
  19. June 2024, Chemistry Paper 1 Foundation, Q01.3 (1 mark): What name is given to the number of protons in an atom? [1 mark] Tick () one box. Atomic number Group number Mass number
  20. June 2024, Chemistry Paper 1 Foundation, Q01.4 (2 marks): Table 1 shows the name and the relative charge of the particles in a potassium atom. Table 1 Name of particle Relative charge Proton 0 Electron –1 Complete Tabl
  21. June 2024, Chemistry Paper 1 Foundation, Q01.5 (1 mark): The electronic structure of a potassium atom is 2,8,8,1 Figure 1 represents the electronic structure of a potassium ion. Figure 1 What is the charge on a potass
  22. June 2024, Chemistry Paper 1 Foundation, Q01.7 (1 mark): Potassium has two isotopes. Table 2 shows the percentage (%) abundance of the two isotopes. Table 2 Isotope Percentage (%) abundance K 19 39 93 K 19 41 7 How is
  23. June 2024, Chemistry Paper 1 Foundation, Q04.1 (1 mark): Figure 7 shows the apparatus used to separate the dyes in a black ink. Figure 7 What is the name of this method? [1 mark]
  24. June 2024, Chemistry Paper 1 Foundation, Q04.2 (1 mark): Name the separation method shown in Figure 8. [1 mark]
  25. June 2024, Chemistry Paper 1 Foundation, Q04.3 (2 marks): Explain why solid C separated from the mixture of C and D. Use Figure 8. [2 marks]
  26. June 2024, Chemistry Paper 1 Foundation, Q04.4 (1 mark): Name the separation method shown in Figure 9. [1 mark]
  27. June 2024, Chemistry Paper 1 Foundation, Q04.5 (1 mark): Table 5 shows the boiling points of the three liquids, G, H and I. Table 5 Liquid Boiling point in °C G 56 H 78 I 100 Which liquid collected first in the conica
  28. June 2024, Chemistry Paper 1 Foundation, Q04.6 (2 marks): Two processes occur in the apparatus shown in Figure 9. Draw one line from each description to the name of the process. [2 marks] Description Name of process Li
  29. June 2024, Chemistry Paper 1 Foundation, Q04.7 (1 mark): Figure 10 shows part of the apparatus shown in Figure 9. Figure 10 Which statement is correct? [1 mark] Tick () one box. The temperature of water at K is lower
  30. June 2024, Chemistry Paper 1 Foundation, Q05.2 (1 mark): Which represents molten magnesium chloride? [1 mark] Tick () one box. MgCl2(g) MgCl2(l) MgCl2(s)
  31. June 2024, Chemistry Paper 1 Foundation, Q07.3 (2 marks): Beaker N contained copper sulfate solution. Describe how the student could produce copper sulfate crystals from the copper sulfate solution in beaker N. [2 mark
  32. June 2024, Chemistry Paper 2 Higher, Q01.4 (1 mark): The alkane molecule C14H30 can be cracked to produce smaller molecules. Balance the equation for the reaction. [1 mark] C14H30 → C8H18 + C3H6 Propene (C3H6) is
  33. June 2024, Chemistry Paper 2 Foundation, Q02.4 (1 mark): The formula of anhydrous copper sulfate is CuSO4 What is the total number of atoms in the formula CuSO4? [1 mark] Tick () one box. 3 4 6 7
  34. June 2024, Chemistry Paper 2 Foundation, Q06.4 (1 mark): The alkane molecule C14H30 can be cracked to produce smaller molecules. Balance the equation for the reaction. [1 mark] C14H30 → C8H18 + C3H6 Propene (C3H6) is
  35. June 2023, Chemistry Paper 1 Higher, Q03.2 (4 marks): Explain what happens to sodium atoms and to oxygen atoms when sodium reacts with oxygen to produce sodium oxide (Na2O). Answer in terms of electrons. [4 marks]
  36. June 2023, Chemistry Paper 1 Higher, Q04.1 (1 mark): What is the order of discovery of the proton, neutron and electron? [1 mark] Tick () one box. electron → neutron → proton electron → proton → neutron neutron →
  37. June 2023, Chemistry Paper 1 Higher, Q04.2 (2 marks): Table 1 shows the mass of a proton and of an electron. Table 1 Name of particle Mass in kg Proton 1.673 × 10–27 Electron 9.109 × 10–31 Calculate how many times
  38. June 2023, Chemistry Paper 1 Higher, Q04.3 (1 mark): What is the number of neutrons in this bromine atom? [1 mark]
  39. June 2023, Chemistry Paper 1 Higher, Q04.4 (1 mark): What is the number of electrons in a bromide ion? [1 mark]
  40. June 2023, Chemistry Paper 1 Higher, Q04.5 (3 marks): Chlorine has two isotopes. Table 2 shows the percentage abundance of the two isotopes of chlorine. Table 2 Isotope Percentage (%) abundance Cl 17 35 75.77 Cl 17
  41. June 2023, Chemistry Paper 1 Higher, Q06.1 (2 marks): Describe how solid magnesium chloride is obtained from the reaction mixture. [2 marks]
  42. June 2023, Chemistry Paper 1 Foundation, Q01.1 (2 marks): Figure 1 represents a beryllium atom. Figure 1 What is the number of protons and the number of neutrons in the beryllium atom? [2 marks] Number of protons Numbe
  43. June 2023, Chemistry Paper 1 Foundation, Q01.2 (1 mark): Figure 2 represents a beryllium ion. Figure 2 What is the relative charge on a beryllium ion? [1 mark] Tick () one box. 0 +1 +2
  44. June 2023, Chemistry Paper 1 Foundation, Q01.6 (1 mark): Figure 4 shows three models for the atom. Figure 4 What is the order for the development of the model of the atom? [1 mark] Tick () one box.
  45. June 2023, Chemistry Paper 1 Foundation, Q01.7 (1 mark): Complete the sentence. Choose the answer from the box. [1 mark] Bohr Chadwick Mendeleev The existence of neutrons was discovered by .
  46. June 2023, Chemistry Paper 1 Foundation, Q04.3 (1 mark): Copper ions and bromide ions carry the electrical charge through the solution. The formula of a copper ion is Cu2+ The formula of a bromide ion is Br – What is
  47. June 2023, Chemistry Paper 1 Foundation, Q05.5 (1 mark): Balance the equation for the reaction. [1 mark] TiCl4 + 4 Na → Ti + NaCl
  48. June 2022, Chemistry Paper 1 Higher, Q02.1 (1 mark): Potassium sulfate contains K+ and SO42– ions. What is the formula of potassium sulfate? [1 mark] Tick () one box. KSO4 K2SO4 K(SO4)2 K2(SO4)2
  49. June 2022, Chemistry Paper 1 Higher, Q07.2 (2 marks): Complete the equation. You should balance the equation. [2 marks] Na + TiCl4 → +
  50. June 2022, Chemistry Paper 1 Foundation, Q01.2 (2 marks): Figure 1 shows a lithium atom. Figure 1 What is the number of electrons and neutrons in the atom of lithium? [2 marks] Number of electrons Number of neutrons
  51. June 2022, Chemistry Paper 1 Foundation, Q01.3 (1 mark): What is the relative charge on a lithium ion? [1 mark] Tick () one box. +1 0 –1
  52. June 2022, Chemistry Paper 1 Foundation, Q01.9 (1 mark): Figure 3 represents the electronic structure of a sodium atom and of a potassium atom. Figure 3 Complete the sentence. Choose the answer from the box. [1 mark]
  53. June 2022, Chemistry Paper 1 Foundation, Q06.1 (1 mark): Potassium sulfate contains K+ and SO42– ions. What is the formula of potassium sulfate? [1 mark] Tick () one box. KSO4 K2SO4 K(SO4)2 K2(SO4)2
  54. June 2022, Chemistry Paper 2 Higher, Q04.3 (2 marks): When C11H24 is cracked, three products are formed. Complete the equation for the reaction. [2 marks] C11H24 → C5H10 + 2 +
  55. June 2022, Chemistry Paper 2 Foundation, Q05.7 (1 mark): Balance the equation for the cracking of C6H14 [1 mark] C6H14 → C2H6 + C2H4
  56. November 2021, Chemistry Paper 1 Higher, Q01.2 (1 mark): Which model represents the plum pudding model? [1 mark] Tick () one box. A B C D
  57. November 2021, Chemistry Paper 1 Higher, Q01.3 (1 mark): Which model resulted from Chadwick’s experimental work? [1 mark] Tick () one box. A B C D Potassium has different isotopes.
  58. November 2021, Chemistry Paper 1 Higher, Q01.4 (2 marks): What is meant by ‘isotopes’? You should refer to subatomic particles. [2 marks]
  59. November 2021, Chemistry Paper 1 Higher, Q01.5 (3 marks): Table 1 shows the mass numbers and the percentage abundance of two isotopes of potassium. Table 1 Mass number Percentage abundance 39 93.1 41 6.9 Calculate the
  60. November 2021, Chemistry Paper 1 Higher, Q02.5 (1 mark): The formula of the zinc ion is Zn2+ The formula of the nitrate ion is NO3– What is the formula for zinc nitrate? [1 mark] Tick () one box. ZnNO3 Zn(NO3)2 Zn2NO
  61. November 2021, Chemistry Paper 1 Higher, Q06.1 (3 marks): 0.12 g of magnesium reacted to produce 0.20 g of magnesium oxide. Calculate the number of moles of oxygen gas (O2) that reacted. Relative atomic mass (Ar): O =
  62. November 2021, Chemistry Paper 1 Higher, Q06.3 (3 marks): Copper reacts with oxygen to produce copper oxide. 63.5 g of copper produces 79.5 g of copper oxide. Calculate the mass of copper oxide produced when 0.50 g of
  63. November 2021, Chemistry Paper 1 Higher, Q06.4 (4 marks): Iron reacts with oxygen to produce an oxide of iron. 0.015 moles of iron reacts with 0.010 moles of oxygen gas (O2). Determine: • the formula of the iron oxide
  64. November 2021, Chemistry Paper 1 Foundation, Q01.2 (1 mark): Write the word equation for the reaction when magnesium reacts with chlorine. [1 mark] + →
  65. November 2021, Chemistry Paper 1 Foundation, Q03.1 (1 mark): What is the approximate radius of a carbon atom? [1 mark] Tick () one box. 0.1 m 0.1 mm 0.1 nm
  66. November 2021, Chemistry Paper 1 Foundation, Q03.2 (6 marks): Figure 3 shows an atom of carbon. Figure 3 Describe the atomic structure of this carbon atom. You should include the number of electrons, neutrons and protons.
  67. November 2021, Chemistry Paper 1 Foundation, Q06.2 (1 mark): Which model represents the plum pudding model? [1 mark] Tick () one box. A B C D
  68. November 2021, Chemistry Paper 1 Foundation, Q06.3 (1 mark): Which model resulted from Chadwick’s experimental work? [1 mark] Tick () one box. A B C D Potassium has different isotopes.
  69. November 2021, Chemistry Paper 1 Foundation, Q06.4 (2 marks): What is meant by ‘isotopes’? You should refer to subatomic particles. [2 marks]
  70. November 2021, Chemistry Paper 1 Foundation, Q06.5 (3 marks): Table 2 shows the mass numbers and the percentage abundance of two isotopes of potassium. Table 2 Mass number Percentage abundance 39 93.1 41 6.9 Calculate the
  71. November 2021, Chemistry Paper 1 Foundation, Q07.5 (1 mark): The formula of the zinc ion is Zn2+ The formula of the nitrate ion is NO3– What is the formula for zinc nitrate? [1 mark] Tick () one box. ZnNO3 Zn(NO3)2 Zn2NO
  72. November 2021, Chemistry Paper 2 Foundation, Q01.4 (2 marks): Draw one line from each substance to the description of the substance. [2 marks] Substance Description of substance Sodium chloride solution Water Compound Elem
  73. November 2020, Chemistry Paper 1 Higher, Q01.1 (2 marks): An aluminium atom is represented as: Al 13 27 Give the number of electrons and neutrons in the aluminium atom. [2 marks] Number of electrons Number of neutrons
  74. November 2020, Chemistry Paper 1 Higher, Q04.7 (2 marks): Complete the symbol equation for the preparation of sodium sulfate. You should balance the equation. [2 marks] NaOH + H2SO4 → +
  75. November 2020, Chemistry Paper 1 Higher, Q06.1 (2 marks): In the alpha particle scattering experiment alpha particles are fired at gold foil. Alpha particles are positively charged. Figure 5 shows the results. Figure 5
  76. November 2020, Chemistry Paper 1 Higher, Q06.2 (3 marks): The gold foil is: • 4.00 × 10–7 metres thick • 2400 atoms thick. What is the diameter of one gold atom in metres? Give your answer to 3 significant figures. [3
  77. November 2020, Chemistry Paper 1 Foundation, Q01.5 (1 mark): The formula of the copper ion is Cu2+ The formula of the oxide ion is O2– What is the formula of copper oxide? [1 mark] Tick () one box. Cu2O2 CuO2 CuO
  78. November 2020, Chemistry Paper 1 Foundation, Q01.7 (1 mark): Complete the sentence to show how the student makes sure that all the acid reacts. Choose the answer from the box. [1 mark] in excess in solution molten soluble
  79. November 2020, Chemistry Paper 1 Foundation, Q01.8 (1 mark): The student filters the unreacted copper oxide from the solution. Which apparatus does the student use? [1 mark] Tick () one box.
  80. November 2020, Chemistry Paper 1 Foundation, Q03.1 (1 mark): Some alpha particles are deflected. Complete the sentence. Choose the answer from the box. [1 mark] negatively charged not charged positively charged Some alpha
  81. November 2020, Chemistry Paper 1 Foundation, Q03.2 (1 mark): Why are most alpha particles not deflected? [1 mark] Tick () one box. The atom is a tiny sphere that cannot be divided. The atom is mainly empty space. The ele
  82. November 2020, Chemistry Paper 1 Foundation, Q03.3 (1 mark): What was one conclusion from the alpha particle scattering experiment? [1 mark] Tick () one box. The mass is concentrated at the centre of the atom. The mass i
  83. November 2020, Chemistry Paper 1 Foundation, Q06.1 (2 marks): An aluminium atom is represented as: Al 13 27 Give the number of electrons and neutrons in the aluminium atom. [2 marks] Number of electrons Number of neutrons
  84. November 2020, Chemistry Paper 2 Higher, Q01.1 (1 mark): Balance the equation for the combustion of propane. [1 mark] C3H8 + O2 → 3 CO2 + 4 H2O
  85. November 2020, Chemistry Paper 2 Higher, Q01.3 (1 mark): Propane can be cracked to produce propene and hydrogen. Complete the symbol equation for the reaction. [1 mark] C3H8 → + H2 propane propene hydrogen
  86. November 2020, Chemistry Paper 2 Foundation, Q01.3 (1 mark): What is the name of the process used in separating hydrocarbons from crude oil? [1 mark] Tick () one box. Chromatography Filtration Fractional distillation
  87. November 2020, Chemistry Paper 2 Foundation, Q04.1 (2 marks): The symbol equation for the decomposition of hydrogen peroxide (H2O2) is: 2 H2O2 → 2 H2O + O2 Complete the word equation for the decomposition of hydrogen perox
  88. November 2020, Chemistry Paper 2 Foundation, Q06.1 (1 mark): Balance the equation for the combustion of propane. [1 mark] C3H8 + O2 → 3 CO2 + 4 H2O
  89. November 2020, Chemistry Paper 2 Foundation, Q06.3 (1 mark): Propane can be cracked to produce propene and hydrogen. Complete the symbol equation for the reaction. [1 mark] C3H8 → + H2 propane propene hydrogen
  90. June 2019, Chemistry Paper 1 Higher, Q02.2 (1 mark): What is the formula of nitric acid? [1 mark] Tick () one box. HCl HNO3 H2SO4 NH4OH
  91. June 2019, Chemistry Paper 1 Higher, Q03.4 (3 marks): The equation shows the decomposition of hydrogen peroxide. 2 H –O –O –H → 2 H – O –H + O=O Table 1 shows the bond energies. Table 1 Bond O–O O=O O–H Bond dissoc
  92. June 2019, Chemistry Paper 1 Higher, Q06.1 (1 mark): Sodium reacts with chlorine. What is the balanced equation for the reaction? [1 mark] Tick () one box. Na + Cl → NaCl Na + Cl2 → NaCl2 2 Na + Cl2 → 2 NaCl 2 Na
  93. June 2019, Chemistry Paper 1 Foundation, Q03.4 (2 marks): Number of protons Number of neutrons 39 38
  94. June 2019, Chemistry Paper 1 Foundation, Q03.5 (1 mark): Tick () one box. Fullerenes Ions Isotopes Molecules 40
  95. June 2019, Chemistry Paper 1 Foundation, Q03.6 (1 mark): Tick () one box. 2 2, 8 2, 8, 2 2, 8, 8
  96. June 2019, Chemistry Paper 1 Foundation, Q05.2 (1 mark): Figure 4 shows the percentage by mass of the elements calcium, carbon and oxygen in calcium carbonate. Figure 4 What is the percentage by mass of calcium in cal
  97. June 2019, Chemistry Paper 1 Foundation, Q07.2 (1 mark): What is the formula of nitric acid? [1 mark] Tick () one box. HCl HNO3 H2SO4 NH4OH
  98. June 2019, Chemistry Paper 2 Higher, Q05.1 (1 mark): Which is the correct ionic equation for the reaction? [1 mark] Tick () one box. Mg + 2 H+ → Mg2+ + H2 Mg2+ + 2 Cl– → MgCl2 Mg + 2 HCl → MgCl2 + H2 Mg+ + Cl– →
  99. June 2018, Chemistry Paper 1 Higher, Q02.1 (2 marks): State one difference and one similarity in the electronic structure of sodium and of chlorine. [2 marks] Difference Similarity
  100. June 2018, Chemistry Paper 1 Higher, Q04.3 (1 mark): A fluorine atom can be represented as 19 9 F What is the total number of electrons in a fluorine molecule (F2)? [1 mark] Tick one box. 9 14 18 38
  101. June 2018, Chemistry Paper 1 Higher, Q04.4 (2 marks): Aluminium reacts with bromine to produce aluminium bromide. Complete the balanced chemical equation for this reaction. [2 marks] Al + Br2  2
  102. June 2018, Chemistry Paper 1 Higher, Q06.2 (3 marks): The relative formula mass (Mr) of a Group 2 metal carbonate is 197 Relative atomic masses (Ar): C = 12 O = 16 Calculate the relative atomic mass (Ar) of the Gro
  103. June 2018, Chemistry Paper 1 Higher, Q08.2 (1 mark): Suggest how any unreacted iron can be separated from the mixture. [1 mark]
  104. June 2018, Chemistry Paper 1 Foundation, Q02.3 (2 marks): Chlorine reacts with potassium bromide solution. Complete the word equation. [2 marks] potassium chlorine + bromide  +
  105. June 2018, Chemistry Paper 1 Foundation, Q03.3 (1 mark): In an equation, zinc nitrate is written as Zn(NO3)2(aq). What does (aq) mean? [1 mark] Tick one box. Dissolved in water Insoluble Not all reacted Reactant
  106. June 2018, Chemistry Paper 1 Foundation, Q04.2 (2 marks): Name the two products when calcium carbonate (CaCO3) is heated. [2 marks] and
  107. June 2018, Chemistry Paper 1 Foundation, Q04.8 (4 marks): A student repeated the experiment with a different Group 2 metal carbonate (XCO3). The relative formula mass (Mr) of XCO3 is 84 Relative atomic masses (Ar): C =
  108. June 2018, Chemistry Paper 1 Foundation, Q06.1 (2 marks): State one difference and one similarity in the electronic structure of sodium and of chlorine. [2 marks] Difference Similarity
  109. June 2018, Chemistry Paper 2 Higher, Q01.5 (1 mark): Alkanes burn in oxygen. Balance the equation for methane burning. [1 mark] CH4 + O2 → CO2 + H2O
  110. June 2018, Chemistry Paper 2 Higher, Q05.1 (2 marks): Complete the equation for the reaction. [2 marks] CaCO3 + HCl →
  111. June 2018, Physics Paper 1 Higher, Q01.1 (4 marks): Write the labels on Figure 1 Choose the answers from the box. [4 marks] atom electron nucleus neutron orbit proton

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