Van der waals forces can best be described as the attractive or repulsive forces that are formed
between oppositely charged ions in a crystal.
during dipole-dipole interactions between molecules.
when molecules move apart in the absence of other forces.
by a random, short-lived redistribution of electrons.

Why is the bond angle in a water molecule less than the bond angle of methane? a. the central oxygen atom in water has two lone pairs of electrons, whereas the central carbon atom in methane has no lone pairs. b. the central hydrogen atom in water has one lone pair of electrons, whereas the central carbon atom in methane has two lone pairs. c. the central oxygen atom in water has four lone pairs of electrons, whereas the central carbon atom in methane has only one lone pair. d. the central oxygen atom exerts more repulsive force on surrounding atoms than the central carbon atom in methane does. reset next

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What is the atomic number of an atom that has 6 protons