Question

Why diamond , boron , silicon have high melting point even though they are not metals

Answer 1

Dear student,

Diamond, boron and Silicon has a very high melting point and boiling point because:

• all the atoms in Diamond, boron and Silicon are held together by strong covalent bonds
• which need a very large amount of energy to be broken.

They have a giant lattice structure in which each atom is covalently-bonded to four other atoms in a tetrahedral arrangement. This extends in three dimensions to form a giant molecule or macromolecule.

​Regards