Question

how can you say that diamond is a hardest element

Answer 1

Diamond is the hardest naturally occurring substance found on Earth. But it is not the hardest substance. Wurtzite boron nitride (synthetic) and lonsdaleite (which comes from meteorites) are both harder.

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Answer 2

$\huge\textbf{Answer}$


In diamond... four electrons are shared within four carbon atoms. Which forms a very strong chemical bonds.


Bonding between four carbon atoms results in extremely rigid structure which is called as tetrahedral crystal.


Because of that tightly arrangement of bonds. Diamond is known as the one the hardest substance on our Earth.