INTERMOLECULAR BONDS

Ø Electrostatic forces. Opposite charges attract each other. o These are the strongest intermolecular forces. Hold many ions in a crystal lattice structure.

o Nonpolar bonding with an equal sharing of electrons. o Polar bonding with an unequal sharing of electrons.

the attraction between positive and negative charges

are the forces within a molecule (e.g., ionic, covalent, polar covalent, metallic).

are forces between different molecules (e.g., atoms or ions).

forces of attraction between polar molecules

attractive forces between an ion and a polar molecule

Molecules are attracted to each other in a compound by these positive and negative forces

the intermolecular force in which a hydrogen atom that is bonded to a highly electronegative atom is attracted to an unshared pair of electrons of an electronegative atom in a nearby molecule

is a temporary attractive force that results when the electrons in two adjacent atoms occupy positions that make the atoms form temporary dipoles

temporary dipole that occurs for a brief moment in time when the electrons of an atom or molecule are distributed asymmetrically

a slight attraction that develops between the oppositely charged regions of nearby molecules

hydrogen bond

London dispersion forces

Ion-Ion > Ion-dipole > hydrogen bonding > dipole-dipole > London dispersion forces