van der waals forces can best be described as...
van der waals forces can best be described as the attractive or repulsive forces that are formed\nbetween oppositely charged ions in a crystal.\nduring dipole - dipole interactions between molecules.\nwhen molecules move apart in the absence of other forces.\nby a random, short - lived redistribution of electrons.
Answer
# Brief Explanations:
Van der Waals forces include dipole - dipole interactions. Oppositely charged ions in a crystal form ionic bonds. Molecules moving apart in the absence of other forces is not the description of van der Waals forces. A random, short - lived redistribution of electrons describes London dispersion forces (a type of van der Waals force but not the best overall description). The best general description among the options for van der Waals forces (which include dipole - dipole, dipole - induced dipole and London dispersion) is during dipole - dipole interactions between molecules.
# Answer:
during dipole - dipole interactions between molecules.