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Question

A non-metal X exists in two different forms Y and Z. Y is the hardest natural substance, whereas Z is a good conductor of electricity. Identify X, Y and Z. [3 MARKS]


Solution

Each identification: 1 Mark

X is carbon. It is a non-metal.
Y is diamond. It is the hardest natural substance and an exception among non-metals because of this property.
Z is graphite. It is a non-metal but a good conductor of electricity.
 

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