chem bonding Flashcards
simple molecular structure: type of attraction
atoms: strong covalent bonds
molecules: weak intermolecular forces of attraction
melting/boiling point of sms
low; little energy needed to overcome weak imfoa
solubility of sms
dissolves in organic solvents
does not dissolve in polar solvents (eg water)
conductivity of sms
poor; absence of mobile charge carriers, no delocalised electrons and simple molecules do not carry overall charge
giant molecular structure: type of attraction
atoms: strong covalent bonds
layers (graphite): weak imfoa
melting/boiling point of gms
high; large amount of energy needed to break apart strong covalent bonds
solubility of gms
insoluble
conductivity of gms
poor in diamond etc; absence of mobile charge carriers. no delocalised electrons
good in graphite; each c atom is bonded to 3 other c atoms so there is 1 delocalised electron per c atom capable of acting as a mobile charge carrier
giant ionic crystal lattice structure: type of attraction
strong electrostatic forces of attraction
melting/boiling point of gicls
high; large amount of energy needed to break apart strong electrostatic forces of attraction btw ions
solubility of gicls
dissolves in polar solvents, does not dissolve in organic solvents
conductivity of gicls
good in molten/aqueous states; strong bonds btw ions are broken, ions are now mobile and can act as mobile charge carriers
poor in solid states; ions are held in fixed positions, absence of mobile ions
giant metallic lattice structure: type of attraction
strong electrostatic foa btw positively charged metal cations and negatively charged “sea” of delocalised electrons
melting/boiling point of gmls
high; large amount of energy needed to break apart strong metallic bonds btw cations and “sea” of delocalised electrons
solubility of gmls
insoluble
