N-H   nonpolar-covalent, polar-covalent or ionic
 bonds
 O-H   nonpolar-covalent, polar-covalent or ionic
 bonds
 C-H   nonpolar-covalent, polar-covalent or ionic
 bonds
 C-F   nonpolar-covalent, polar-covalent or ionic
 bonds
 Na-Cl nonpolar-covalent,
 polar-covalent or ionic bonds
 Al-Cl  nonpolar-covalent, polar-covalent or ionic
 bonds