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Unit 2: Intermediate bonding and bond polarity and Intermolecular Forces
Increases across a period and decreases down a group due to shielding.
Intermolecular forces are relatively weak forces of attraction between molecules.
Three Forces to be considered
London Forces (van der Waals Forces)
Intermolecular forces/ bonding has to be the same type between the different molecules, for
solutions to be formed.
E.g. Calcium Chloride ionic compounds dissolve in polar solvents. Ionic compounds do
not dissolve in nonpolar solvents.
Miscibility Nonpolar liquids that mix together completely.
Immiscibility Polar and nonpolar liquids mix and form 2 separate layers, one on top of the