• Why do some solids dissolve in water but others do not?• Why are some substances gases at room temperature, but others are liquid or solid?• What gives metals the ability to conduct electricity, what makes non-metals brittle? • The answers have to do with … Intermolecular forcesIntermolecular forcesQuestionsOverviewOverview• There are 2 types of attraction in molecules: intramolecular bonds & intermolecular forces• We have already looked at intramolecularbonds (ionic, polar, non-polar)• Intermolecular forces (IMF) have to do with the attraction between molecules (vs. the attraction between atoms in a molecule)• IMFs come in six flavours: 1) ionic, 2) dipole - dipole, 3) H-bonding, 4) London forces, 5) covalent (network solids), 6) metallicIntermolecular forcesIntermolecular forcesIonic, Dipole Ionic, Dipole - Dipole attractionsDipole attractions•We have seen that molecules can have a separation of charge•This happens in both ionic and polar bonds (the greater the EN,
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