plumiGiant metallic and covalent lattices: OCR A‑Level Chemistry A questions
OCR A-Level Chemistry A past-paper questions on 3.1.1.3 Giant metallic and covalent lattices, 2016–2025, with mark schemes and examiner’s reports where available.
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Q16(a)(ii)
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All 17 questions on Giant metallic and covalent lattices, as a list
- June 2025, Paper 1, Q16(a)(ii) (3 marks): Explain why silicon has a higher melting point than aluminium. Use ideas about structure and bonding in your answer. [3]
- June 2025, AS Paper 1, Q21(c) (3 marks): Magnesium has a giant metallic structure. • Draw a labelled diagram to show the bonding and structure in magnesium. Include the correct charges on the metal par
- June 2023, Paper 3, Q1(e) (1 mark): The element in Period 3 that exists in the solid state as a network of atoms bonded by strong covalent bonds. [1]
- June 2023, AS Paper 2, Q2(c)(i) (4 marks): Complete the table above to show the type of lattice structure of each substance. [4]
- June 2023, AS Paper 2, Q2(c)(ii) (4 marks): Explain the following: • MgS has a higher melting point than PCl 3. • Al has a greater electrical conductivity than Si. Melting points Conductivities [4]
- June 2022, AS Paper 1, Q1 (1 mark): Which substance has a giant covalent lattice structure in its solid state? A potassium B silicon C sodium chloride D water Your answer [1]
- June 2022, AS Paper 1, Q23(c) (4 marks): Describe the structure and bonding and electrical conductivity of calcium in the solid state. You may wish to include a labelled diagram in your answer. [4]
- November 2021, Paper 1, Q16(a) (3 marks): Magnesium has metallic bonding and is a good conductor of electricity. Describe, with the aid of a labelled diagram, the metallic bonding in magnesium and expla
- November 2020, Paper 1, Q16(c) (6 marks): This question is about magnesium, bromine and magnesium bromide. (c)* Table 16.1 shows some physical properties of magnesium, bromine and magnesium bromide. Ele
- November 2020, AS Paper 2, Q3(a) (5 marks): The table shows the melting point and electrical conductivity of two elements in Period 4. Element Melting Point / °C Electrical conductivity Calcium 842 Good B
- June 2019, Paper 1, Q7 (1 mark): Which set of elements in the solid state contain a simple molecular lattice, a giant covalent lattice and a giant metallic lattice? A S, Si, Al B P, Si, C C S,
- June 2019, Paper 3, Q3(b) (4 marks): SiO2 and CO2 are oxides of other Group 14 (Group 4) elements. Solid SiO2 melts at 2156 °C. Solid CO2 melts at −56 °C. Suggest the type of lattice structure in s
- June 2019, AS Paper 2, Q1(b) (5 marks): The table below shows two physical properties of the element strontium. Melting point high Electrical conductivity very good Explain these physical properties o
- June 2018, AS Paper 1, Q10 (1 mark): Which element has induced dipole–dipole interactions (London forces) in its solid lattice? A boron B magnesium C silicon D sulfur Your answer [1]
- June 2018, AS Paper 2, Q2(b) (3 marks): The table below compares the properties of sodium sulfide, sodium and sulfur. Complete the table. Sodium sulfide Sodium Sulfur Melting point / °C 1180 98 113 Ty
- June 2016, AS Paper 1, Q8 (1 mark): What is the shape around the carbon atoms in graphene? A linear B pyramidal C tetrahedral D trigonal planar Your answer [1]
- June 2016, AS Paper 2, Q2(b) (4 marks): Magnesium and silicon have different types of giant structures. Describe the bonding in magnesium and in silicon. Include the names of the particles and describ
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