Differences between the properties of metals and non-metals
2 marks · NormalState one exception to the general rule that metals are solid at room temperature, and one exception to the rule that non-metals do not conduct electricity.
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Mercury is a metal that is liquid at room temperature. Graphite (a form of carbon) is a non-metal that conducts electricity.
Also accept: Accept 'mercury' for liquid metal, 'graphite', 'carbon (graphite)' or 'silicon' for conducting non-metal.
Common mistakes: Stating sodium or potassium as liquid metals; these are only liquid at higher temperatures.
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Marking points
B1 · 1 mark · States mercury (liquid metal at room temperature).
B2 · 1 mark · States graphite or silicon as a non-metal that conducts electricity.
Worked solution
Mercury is an exception, as it is a metal that is liquid at room temperature. Graphite (a form of carbon) is a non-metal that conducts electricity.