Multiple choice

Which of the following options is the hardest form of carbon?

  1. diamond

  2. graphite

  3. charcoal

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diamond is the hardest known natural material because its carbon atoms are arranged in a rigid tetrahedral structure with strong covalent bonds extending in three dimensions. This makes diamond much harder than other forms of carbon like graphite or charcoal.

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