Intermolecular Bonds/Forces

a bond within a molecule

a bond between molecules

bond between 2 identical polar molecules

a bond between a hydrogen atom of one molecule (polar molecule) and a highly electronegative atom ex. (F, O, N) of another molecule (ex. HF, H2O, and NH3)

• strong bonds (strongest intermolecular force) • reasons why water has a high melting point/high boiling point for it’s size • the strongest the intermolecular force the higher the boilng point

• attraction between nonpolar molecules • weak force of attraction so low MP, low BP • reason why non polar molecules exist as liquids at low temp and high pressure • most effective when molecules are close such as between molecules with more electrons and a larger molecular mass • the stronger the VAN der Waals force the higher the melting/boiling point of the substance

attraction between a + or - ion (ionic compound) and the opposite charged ends of a solvent molecule (a liquid in which a substance dissolves )