Solids, such as salts (ionic compounds), are rigidly held in a crystal lattice, mainly by strong _______ forces. Non ionic but polar molecules, such as chloromethane (CH3Cl), are attracted by weaker ______-______ interactions (also of ______ origin). Finally, the nonpolar alkanes attract each other by _______ forces, which are due to electron correlation.
- Coulomb forces
- dipole-dipole interactions
- coulombic origin
- London forces