CH 2 QUIZ - BIO - Lecture notes ch 2 PDF

Preview

Summary

Quiz prep...

Description

Dr.StephanieSchittone GenBio1  



Chapter2Quiz







Page1of5 

Dr.StephanieSchittone  Chapter2Quiz GenBio1   1. Asubstancethatcannotbebrokendownintoothersubstancesbyordinarychemicalprocedures isa(n)_____. a. compound b. isotope c. element d. proton e. molecule 2. Theinnermostelectronshellofanatomcanholdupto_____electrons. a. 32 b. 18 c. 2 d. 8 e. 1. 3. Whichoftheserelationshipsistrueofanunchargedatom? a. Thenumberofprotonsisequaltothenumberofelectrons. b. Thenumberofelectronsisequaltothenumberofneutrons. c. Theatomicmassisequaltothenumberofelectrons. d. Theatomicmassisequaltotheatomicnumber. e. Thenumberofneutronsisequaltothenumberofprotons. 4. Whatdeterminesthetypesofchemicalreactionsthatanatomparticipatesin? a. thenumberofelectronsintheoutermostelectronshell b. itsatomicnumber c. itsatomicmass d. thenumberofprotonsitcontains e. thenumberofelectronsintheinnermostelectronshell 5. Fluorine'satomicnumberis9anditsatomicmassis19.Howmanyneutronsdoesfluorine have? a. 10 b. 19 c. 9 d. 81 e. 28 6. Anunchargedatomofboronhasanatomicnumberof5andanatomicmassof11.Howmany protonsdoesboronhave? a. 5 b. 0 c. 6 d. 16 e. 11  

Page2of5 

Dr.StephanieSchittone  Chapter2Quiz GenBio1  7. Changingthenumberof_____wouldchangeanatomintoanatomofadifferentelement. a. protonsinanatom b. electronscirclingthenucleusofanatom c. particlesinthenucleusofanatom d. neutronsinanatom e. bondsformedbyanatom 8. Theatomsofdifferentphosphorusisotopes_____. a. havedifferentnumbersofelectrons b. havedifferentatomicnumbers c. havedifferentnumbersofneutrons d. havedifferentnumbersofprotons e. reactdifferentlywithotheratoms 9. Thetypeofbondingandthenumbersofcovalentbondsanatomcanformwithotheratomsis determinedby_____. a. thenumberofneutrons b. thenumberofprotons c. thenucleus d. thesizeoftheatom;smalleratomsarechemicallymorereactive e. thenumberofunpairedelectronsinthevalenceshell 10. Acarbonatomandahydrogenatomformwhattypeofbondinamolecule? a. nonpolarcovalentbond b. ionicbond c. hydrogenbond d. polarcovalentbond e. VanderWaalsinteraction 11. Anionicbondisformedwhen_____. a. bothatomsarenonpolar b. oneatomtransfersanelectrontoanotheratom c. bothatomsareelectricallyneutral d. bothatomsareequallyattractivetoelectrons e. atomsaresubjectedtoradioactiveisotopes 12. Chemicalequilibriumisreachedwhen_____. a. theforwardandreversereactionsoccuratthesameratesothattheconcentrationsof reactantsandproductsremainthesame b. allofthereactantsareconvertedtoproducts c. therateatwhichmatterisdestroyedandtherateatwhichitiscreatedoffseteach other d. matterisconserved e. thereversereactionbeginstooccur 13. Whatdoesthetermelectronorbitaldescribe? a. Anelectronorbitaldescribestheexactdistanceofanelectronfromthenucleus. b. Anelectronorbitaldescribestheorbitofanelectronaroundthenucleus. c. Anelectronorbitaldescribesathree‐dimensionalspacewhereanelectroncanbefound 90%ofthetime. Page3of5 

Dr.StephanieSchittone  Chapter2Quiz GenBio1  14. Whichstatementaboutweakbondsiscorrect? a. Weakchemicalbondsformonlybetweenatomsofsimilarelectronegativity. b. Weakbondsarelessimportanttolivingthingsthanstrongcovalentbonds. c. Weakbondsaretransientandeasilyreversible. 15. Wecanrepresentatomsbylistingthenumberofprotons,neutrons,andelectrons‐forexample, 2p+,2n0,2e‐forhelium.Whichofthefollowingrepresentsthe18Oisotopeofoxygen? a. 8p+,10n0,8e‐ b. 6p+,8n0,6e‐ c. 9p+,9n0,9e‐ d. 10p+,8n0,9e‐ e. 7p+,2n0,9e– 16. Theatomicnumberofsulfuris16.Sulfurcombineswithhydrogenbycovalentbondingtoforma compound,hydrogensulfide.Basedonthenumberofvalenceelectronsinasulfuratom,predict themolecularformulaofthecompound. a. HS b. H3S2 c. HS2 d. H4S e. H2S 17. Whatcoefficientsmustbeplacedinthefollowingblankssothatallatomsareaccountedforin theproducts? 18. C6H12O6→_____C2H6O+_____CO2 a. 1;3 b. 3;1 c. 2;2 d. 1;2 e. 1;1 19. Whichofthefollowingbondscanformbetweenatomsofequalelectronegativity? a. VanderWaalsinteractionscanformbetweenatomsofequalelectronegativity. b. Ionicbondscanformbetweenatomsofequalelectronegativity. c. Hydrogenbondscanformbetweenatomsofequalelectronegativity. 20. Comparedwith31P,theradioactiveisotope32Phas a. adifferentcharge. b. onemoreelectron. c. onemoreneutron. d. adifferentatomicnumber. e. onemoreproton.  



Page4of5 ...