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Question

Which is harder graphite or diamond?


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Solution

Diamond is harder than graphite because it is a crystalline form of carbon in which each carbon atom is covalently connected with four other carbon atoms.

The carbon atoms in a diamond form 4 covalent bonds as a tetrahedral structure.

  • Graphite is an amorphous allotrope of carbon.
  • Where the carbon atoms in the graphite form 4 covalent bonds as a hexagonal structure. It forms layers, which can slide over each other.
  • Here the force of attraction between the layers is weak, and this is the reason why they can slide over each other.
  • Graphite is also soft and slippery.
  • They are used in the industries in the form of lubricants.

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