intermolecular forces

*forces between molecules

strength: electrostatic>hydrogen bonding> dipole-dipole> London dispersion forces

Electrostatic

• essence of ionic bond

• cation to anion

• between metal and polyatomic ion

• strongest force

Hydrogen bonding

• between hydrogen and nitrogen, oxygen or fluorine

• covalent

Dipole Dipole

• between polar covalent molecule

London Dispersion Forces

• temporary, momentary dipole

• happens in all molecules

• only force in non polar molecules

• only non polar molecules

Polarity and forces

non polar- only london dispersion forces

polar- dipole-dipole and London dispersion forces

hydrogen bonding- dipole dipole and london dispersion forces

electrostatic- ionic