A. Chemical bonds form when electrons between atoms are transferred, shared, or delocalized.
I’m referring to ionic bonds, covalent bonds, and metallic bonds, which are all forms of chemical bonds.
B. Chemical bonds have a great effect on boiling and melting point by raising them.
Because of chemical bonds, it will become extremely hard to separate atoms, which essentially means that the melting point and boiling point will become much higher.
-T.B.