Why things conduct electricity

2 marks · Hard

Explain, with reference to structure and particles, why molten lead(II) bromide can conduct electricity.

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Also accept: Molten lead(II) bromide conducts because in the molten state, its ions are free to move and can carry charge.

Common mistakes: Saying electrons conduct in lead(II) bromide; Not specifying molten state or ions free

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Marking points

M1 · 1 mark · States that in the molten state, lead(II) bromide exists as ions.

M2 · 1 mark · Mentions that ions are free to move and carry charge in the molten state.

Worked solution

Molten lead(II) bromide contains ions that are free to move. Because these charged particles can move, they can carry electric current.