MSE Test 2 Review

MSE Test 2 Review - *Primary Bonding Corresponf to ionic...

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*Primary Bonding: Corresponf to ionic, covalent and metallic bonds. Strong (100-1000 kJ/mole) *Secondary bonding (Van der walls) weak forces due to dipole interactions. (.1- 10kJ/mole) *Secondary bonds important: form ice, was, sulfur. Bonding is covalent, form molecular solids. Produces very soft material, low melting point. *Van der Waals occur in attraction b/w dipoles. Dipoles produced by charge separation: asymmetric distribution of electronic distribution. *Many organic molecules (acid, alcohol) have permanent dipoles. The dipole induces electrostatic attractive forces b/w molecules. *Molecules w. no permanent dipole can participate in van der waal forces therough induced dipoles. Exerts an attractive electrostatic force on neighboring molecules. *London forces correspond to attractive interaction b/w temp. instantaneous dipoles. Random orientation of dipoles: no attraction. *Hydrogen having low electroneg. Carry fractional positive charge are called acidic. *Responsible for the shape and structure of folded chains ofamino acids forming the
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MSE Test 2 Review - *Primary Bonding Corresponf to ionic...

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