Question

    Thesubstancewhichconductscurrentin the solid state is

    A diamond Correct Answer Incorrect Answer
    B graphite Correct Answer Incorrect Answer
    C iodine Correct Answer Incorrect Answer
    D sodium chloride Correct Answer Incorrect Answer

    Solution

    Thestructureofgraphiteisunlike most other network substances. It is formed in 'sheets'ofcarbonatoms,eachofwhichisbonded toonlythreeothers.Thefourthvalenceelectron of the carbon atomis delocalized and can move between the different layers, therefore carrying an electrical charge through the network of carbon atoms, a conductor is a material which contains movable electric charges. Unlike diamond (another carbon allotrope), graphite is an electrical conductor, a. semimetal.

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