Chapter 02 Multiple Choice.docx
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Chapter 02 Multiple Choice.docx
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Chapter02MultipleChoice
C021.
A1.0MsolutionofHClhasapHof
A)
1.0.
B)
7.0.
C)
14.0.
D)
11.2.
E)
14
2.
Thepartoftheatomthatdetermineshowtheatombehaveschemicallyisthe
A)
proton.
B)
electron.
C)
neutron.
D)
innermostshell.
E)
nucleus.
3.
Hydrogen,deuterium,andtritiumallhavethesame
A)
atomicweight.
B)
atomicnumber.
C)
mass.
D)
density.
E)
nuclearcomposition.
4.
Whichcomponentofanatomdoesnotsignificantlyaddtothemassofanatom?
A)
Proton
B)
Neutron
C)
Electron
D)
Bothaandb
E)
a,b,andc
5.
Whichofthefollowingdescribesanunusualpropertyofwater?
A)
Waterwillnotreactwithotheratoms.
B)
Water'ssolidstateismoredensethanitsliquidstate.
C)
Energyisnotrequiredtochangewaterfromasolidtoaliquid.
D)
Littleheatenergyisneededtoraisethetemperatureofwater.
E)
Thehydrogenbondsbetweenwatermoleculescontinuallyformandbreak.
6.
Inadditiontocovalentandionicbonds,whichofthefollowinginteractionsareimportantinbiologicalsystems?
A)
vanderWaalsinteractions
B)
Hydrogenbonds
C)
Hydrophobicinteractions
D)
Bothaandb
E)
a,b,andc
7.
Whatisthedifferencebetweenanatomandanelement?
A)
Anatomismadeofprotons,electrons,andsometimesneutrons;anelementisasubstancecomposedofonlyonekindofatom.
B)
Anelementismadeofprotons,electrons,andsometimesneutrons;anatomisasubstancecomposedofonlyonekindofelement.
C)
Anatomdoesnotcontainelectrons,whereasanelementdoes.
D)
Anatomcontainsprotonsandelectrons,whereasanelementcontainsprotons,electrons,andneutrons.
E)
Noneoftheabove
8.
Thenumberofprotonsinanatomequalsthenumberof
A)
neutrons.
B)
electrons.
C)
electronsplusneutrons.
D)
neutronsminuselectrons.
E)
isotopes.
9.
Whichofthefollowingstatementsaboutatomsistrue?
A)
Anelectronhasamorenegativechargethanaprotonhaspositivecharge,whichiswhythereareusuallymoreprotonsthanelectronsinanatom.
B)
Neutronssimplyaddmasstoanatomwithouteverinfluencingotherproperties.
C)
Whenprotonsequalelectrons,anatomhasaneutralcharge.
D)
Atomsofanelementareradioactivewhenevertheyvaryintheirnumberofneutrons.
E)
Theenergylevelofelectronsishigherinshellsclosetothenucleus.
10.
Becauseatomscanhavethesamenumberofprotonsbutadifferentnumberofneutrons,elementshave
A)
isotopes.
B)
morethanoneatomicmasslistedontheperiodictable.
C)
morethanoneatomicnumber.
D)
variousmeansofformingchemicalbonds.
E)
isomers.
11.
Anelementhasaweightof131.3.Thereasonthenumberincludes0.3isthat
A)
theatomicweightincludestheweightofelectrons.
B)
atomicweightistheaverageofthemassnumbersofallitsisotopes.
C)
theneutronsdonothaveasingleunitweight.
D)
theatomicweightdoesnotincludetheweightofprotons.
E)
thenumberofelectronsmayvary.
12.
Theatomicnumberofanelementisthesameasthenumberof_______ineachatom.
A)
neutrons
B)
protonspluselectrons
C)
protons
D)
neutronsplusprotons
E)
neutronspluselectrons
13.
Theatomicweightofanelementisthesameasthenumberof_______ineachatom.
A)
electrons
B)
protons
C)
neutrons
D)
protonsplusneutrons
E)
electronsplusneutrons
14.
When7Cdecaysbyreleasingaparticle,itbecomes
A)
significantlylighter.
B)
nitrogen,bygainingaproton.
C)
boron,bylosingaproton.
D)
nitrogen,bylosingaproton.
E)
13C,bylosinganeutron.
15.
Thebestreferencefortheatomicnumberandmassnumberforelementsis
A)
agoodchemistrytext.
B)
adictionary.
C)
theperiodictable.
D)
ageneralphysicsbook.
E)
agoodbiologytext.
16.
Allexcept_______followtheoctetrule.
A)
sodium
B)
chlorine
C)
carbon
D)
hydrogen
E)
nitrogen
17.
Inahydrogenmolecule,thetwoatomsareheldtogetherby
A)
hydrogenbonds.
B)
asharedpairofelectrons.
C)
vanderWaalsforces.
D)
ionicattractions.
E)
gravity.
18.
Hydrogenbonds
A)
formbetweentwohydrogenatoms.
B)
formbetweenhydrogenandoxygenatomswithinamolecule.
C)
formbetweendifferentmolecules.
D)
involvesharingofelectrons.
E)
arethestrongestbondsbecauseoftheirlength.
19.
Whatdeterminesifamoleculeispolar,nonpolar,orionic?
A)
Thenumberofprotons
B)
Thebonddistances
C)
Thedifferencesintheelectronegativitiesoftheatoms
D)
Theioniccharges
E)
Thedistanceoftheelectronsfromthenucleus
20.
Whichpairhassimilarchemicalproperties?
A)
1Hand22Na
B)
12Cand28Si
C)
16Oand8S
D)
12Cand14C
E)
8Hand2He
21.
3115Pand3215Phavevirtuallyidenticalchemicalandbiologicalpropertiesbecausetheyhavethesame
A)
half-life.
B)
numberofneutrons.
C)
atomicweight.
D)
massnumber.
E)
numberofelectrons.
22.
Thenumberofdifferentelementsfoundintheuniverseisclosestto
A)
12.
B)
24.
C)
48.
D)
100.
E)
192.
23.
Whyistheatomicweightofhydrogen1.008andnotexactlyitsmassnumber,1.000?
A)
Atomicweightdoesnottakeintoaccounttheweightoftherareisotopesofanelement.
B)
Atomicweightistheaverageofthemassnumbersofarepresentativesampleoftheelement,includingallitsisotopes.
C)
Theatomicweightincludestheweightoftheelectrons.
D)
Theatomicweightdoesnotincludetheweightoftheprotons.
E)
Themassnumberofanelementisalwayslowerthanitsatomicweight.
24.
Whichofthefollowingelementsisthemostchemicallyreactive?
A)
Hydrogen
B)
Helium
C)
Neon
D)
Argon
E)
Theyallhavethesamechemicalreactivity.
25.
Asinglecovalentchemicalbondrepresentsthesharingofhowmanyelectrons?
A)
One
B)
Two
C)
Three
D)
Four
E)
Six
26.
Themolecularweightofwateris18.0154.Onemoleofwaterweighsexactly_______grams.
A)
9
B)
18
C)
18.0154
D)
36.031
E)
6.023⨯1023
27.
Ionicbondsare
A)
attractionsbetweenoppositelychargedions.
B)
theresultofelectronsharing.
C)
thestrongestofthechemicalbonds.
D)
causedbypartialelectricalcharges.
E)
dependentuponhydrophobicinteractions.
28.
Whatisthedifferencebetweencovalentandionicbonds?
A)
Covalentbondsarethesharingofneutrons,whereasionicbondsarethesharingofelectrons.
B)
Ionicbondsarethesharingofelectronsbetweenatoms,whereascovalentbondsaretheelectricattractionbetweentwoatoms.
C)
Covalentbondsarethesharingofprotonsbetweenatoms,whereasionicbondsaretheelectricattractionbetweentwoatoms.
D)
Covalentbondsarethesharingofprotonsbetweenatoms,whereasionicbondsarethesharingofelectronsbetweentwoatoms.
E)
Covalentbondsarethesharingofelectronsbetweenatoms,whereasionicbondsarethetransferofelectronsfromoneatomtoanother.
29.
Whichcontainsmoremolecules,amoleofhydrogenoramoleofcarbon?
A)
Amoleofcarbon
B)
Amoleofhydrogen
C)
Bothcontainthesamenumberofmolecules.
D)
Inadequateinformationisprovided.
E)
Itdependsonatmosphericpressure.
30.
Sweatingisausefulcoolingdeviceforhumansbecausewater
A)
takesupagreatdealofheatinchangingfromitsliquidstatetoitsgaseousstate.
B)
takesupagreatdealofheatinchangingfromitssolidstatetoitsliquidstate.
C)
canexistinthreestatesattemperaturescommononEarth.
D)
isanoutstandingsolvent.
E)
ionizesreadily.
31.
Whenexposedtoextremeheat,thehumanbodyrelieson_______toabsorbexcesscaloriesofheatandmaintainnormalbodytemperature.
A)
evaporation
B)
condensation
C)
respiration
D)
transpiration
E)
Alloftheabove
32.
Twocharacteristicsofwatermakeitdifferentfrommostothercompounds.Itssolidstateis_______itsliquidstate,andittakesup_______heattochangetoitsgaseousstate.
A)
lessdensethan;largeamountsof
B)
moredensethan;smallamountsof
C)
lessdensethan;smallamountsof
D)
moredensethan;largeamountsof
E)
justasdenseas;no
33.
Specificheatisdefinedas
A)
theheatreleasedfromiceduringfreezing.
B)
theheatneededtoraisethetemperatureofwater.
C)
onecalorie.
D)
thecaloriesneededtoraiseagram1C.
E)
4.184joules.
34.
Whichcharacteristicofwatercontributestotherelativelyconstanttemperaturesoftheoceans?
A)
Waterionizesonlyslightly.
B)
Ittakesasmallamountofheatenergytoraisethetemperatureofwater.
C)
Watercancontainlargeamountsofsalt.
D)
Waterhastheabilitytoionizereadily.
E)
Ittakesalargeamountofheatenergytoraisethetemperatureofwater.
35.
Icefloatsbecause
A)
thecrystaltakesupmorespacethantheliquid.
B)
substancesexpandwhencooled.
C)
heatisreleasedandheatmakeswaterexpand.
D)
hydrogenbondsmustbreak.
E)
heatisabsorbed.
36.
Iceisusedinbeveragesbecause
A)
itiscomposedonlyofwater.
B)
itiscold.
C)
morewaterisneededinthedrink.
D)
peopleliketochewit.
E)
itabsorbsalotofheatwhenitmelts.
37.
Ifyouplaceapapertowelinadishofwater,thewaterwillmoveupthetowelbycapillaryaction.Whichpropertyofwatergivesrisetocapillaryaction?
A)
Watermoleculesionize.
B)
Waterisagoodsolvent.
C)
Watermoleculeshavehydrophobicinteractions.
D)
Watercanformhydrogenbonds.
E)
Watertakesuplarge
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