O-LevelChemistryBonding & Structure5070/11 · Oct/Nov 2013 · Q71 Mark

Which diagram correctly shows the arrangement of the ions in solid sodium chloride?

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A3D lattice with alternating Na+ and Cl- ions arranged in a regular cubic pattern.

B3D lattice with alternating Na+ and Cl- ions, showing a Cl- ion missing from a corner and a Na+ ion shifted out of position.

C3D lattice with alternating Na+ and Cl- ions, showing Na+ at the center of the visible cube.

D3D lattice with alternating Na+ and Cl- ions, showing a Cl- ion replacing a Na+ ion at a corner.

✓ Correct answer

C: 3D lattice with alternating Na+ and Cl- ions, showing Na+ at the center of the visible cube.

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2013 Paper 1 Variant 1, question 7.

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