Why do simple molecular substances have weak intermolecular forces and why do giant covalent substances have strong intermolecular forces?
I understand that in simple molecular substances the atoms within a molecule are held together by strong covalent bonds, but the intermolecular forces between molecules are weak.
But I don't see what makes giant covalent substances have stronger intermolecular forces? What makes them stronger and have higher melting points?
I thought I understood but I think I must have gone wrong somewhere and now I am very confused. Help would be much appreciated. Also please explain simply, chemistry does not come naturally to me so I might get even more confused.