This is the weakest intermolecular force. It forms when all of the electrons randomly swarm to one side of a molecule, creating an instantaneous dipole.

London dispersion force

Explanation:

London dispersion force (Instantaneous dipole-induced dipole interaction) is the weakest intermolecular force. It can occur in atoms or molecules (e.g. Helium atom) which have no permanent dipole, instantaneous dipoles will arise as a result of a momentary imbalance in electron distribution. This interaction only lasts for a very short time (i.e. a fraction of a microsecond).

b

explanation:

mitosis

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.