Why diamond has hardest substance of nature

1.	Why diamond has hardest substance of nature
Answer» Diamond is a allotroph of carbon...carbon is the most versatile element which can form around 3 million compounds..the structure of carbon atoms arranged in diamond structure make structure more firm , stronger and hard...one more compound name Graphene is considered to be the most hardest substance ever known to humanity..it is a single layer of atom of graphite..

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