O-LevelChemistryBonding & Structure5070/11 · May/June 2010 · Q81 Mark

A metal consists of a lattice of positive ions in a 'sea of electrons'. What changes, if any, take place to the electrons and positive ions in a metal wire when an electric current is passed through it?

Areplaced by new electrons, replaced by new ions

Breplaced by new electrons, unchanged

Cunchanged, replaced by new ions

Dunchanged, unchanged

✓ Correct answer

B: replaced by new electrons, unchanged

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Topic: Bonding & Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2010 Paper 1 Variant 1, question 8.

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