Multiple choice

Which is the only non-metal, that is a good conductor of electricity?

  1. Graphite

  2. Phosphorous

  3. Sulphur

  4. Hydrogen
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A Correct answer
Explanation

Graphite is an allotrope (a different structural form) of carbon (so is diamond), but unlike diamond, graphite can conduct electricity. The reason is that graphite consists of flat hexagons, all liked together in a flat plane. The carbons in the hexagons have delocalized pi bonding (pi bonds, along with a sigma bond, make up a double bond) which allows electrons to easily move from atom to atom.

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