May/June 2026 Paper 12

2026 · 40 questions · 40 parts · 40 marks

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7Giant Structures Metallic BondingMedium1 mark
Solid X is known to be an element or compound with a giant lattice structure. The identification key shown can be used to identify the type of giant lattice structure in solid X.
Identification key flowchart. Starting box: ‘does the solid contain more than one element?’ If yes, arrow to ‘does the melted solid conduct electricity?’, which leads to structure 1 if yes and structure 2 if no. If the starting box answer is no, arrow to ‘does the solid contain ions?’, which leads to structure 2 if no and structure 3 if yes.
What are structures 1, 2 and 3, to complete this identification key?
structure 1structure 2structure 3
Acovalentionicmetallic
Bioniccovalentmetallic
Cmetalliccovalentionic
Dionicmetalliccovalent