chem 210 exam 1 Questions 100% Answered!

how to write formula of a molecule - ANSWERC first, H sexond, alphabetical order eg. C3H5BrO nonpolar covalent bonding - ANSWER2 electrons shared equally eg. H-H polar covalent bonding - ANSWER2 electrons shared unequally eg. C-O (more reactive) units of unsaturation - ANSWER(2N+2-m+t)/2 count rings and multiple bonds curved arrow notation - ANSWERbegin where electrons start and point where electrons are going heterdytic break - ANSWERelectrons move together during curved arrow notation homodytic break - ANSWERelectrons split up and each go different places during curved arrow notation equilibrium constant - ANSWERKeq = [products]/[reactants] rank in terms of stability aka resonance structures that contribute more - ANSWER1) closed shell more stable 2) uncharged atoms more stable 3) negative charge more stable than positive 4) + & - charges more stable than like identify delocalizable electrons - ANSWER1) non bonding electrons next to open shell atom 2) multiple bond one away from open shell atom 3) non bonding electrons one away from multiple bond 4) 2,1,2 bond (all multiple bonds are delocalizable) 3D orbital diagram w 4 localized electron pairs - ANSWER4sp3 electronic tetrahedral 1 nbe observed trigonal pyramidal 2 nbe observed bent 3D orbital diagram w 3 localized electron pairs - ANSWER3sp2 electronic trigonal planar 1 nbe observed bent 3D orbital diagram w 2 localized electron pairs - ANSWER2sp 2 unhybridized orbitals electronic linear rank in terms of bond length - ANSWER1) smaller atomic radiums = shorter bond (H is shortest) 2) double bonds shorter than single 3) more eN = shorter bond 4) more s character = shorter bond 5) delocalization (eg. benzene bonds 1.5 length) lewis acid/base chemistry - ANSWERreactions between electron pair acceptors and donors