Diamond is hard because

Options

A. all the four valence electrons are bounded to carbon atoms by covalent bonds
B. it is a giant molecule
C. it is made up of `C` atoms
D. it can not be burned

Answer

1

Explanation

In diamond each carbon atom is tetrahedrally `(sp^(3))` bonded to four other `C` atoms. Moving one plane of atoms in the diamond crystal relative to another requires the breaking of many strong carbon-carbon bonds . Because of this diamond is one of the hardest substance known.