ACS CHEMISTRY FINAL
EXAM WITH THE
CORRECT ANSWERS
Layoutvofvanvelementv(massv#v&vatomicv#)v-vcorrectvanswer-
atomicvnumberv=v-vcorrectvanswer-#vofvprotons
massvnumberv=v-vcorrectvanswer-#vofvprotonsv+vneutrons
thevnumbervofvprotonsvinvavneutralvatomvwillvequalvthev-vcorrectvanswer-
#vofvelectrons
howvtovfindvthevcorrectvnumbervofvneutronsv-vcorrectvanswer-massvnumberv-
vatomicvnumber
Formsvofvthevsamevelementsvthatvdiffervinvamountvofvneutronsv-vcorrectvanswer-
isotopes
Whatvparticle,vifvlostvfromvthevnucleus,vwouldvNOTvcausevavchangevinvthevatomicvnu
mber?v-vcorrectvanswer-avneutronvbecausevitvhasvnovcharge
Whenvalphavparticlesvwerevshotvatvavmetalvfoilvtarget,vmostvpassedvthroughvwithoutv
deflections,vwhilevothersvdeflectedvatvlargevangles.vWhatvdidvthisvsuggestvtovRutherf
, ord?v-vcorrectvanswer-
thatvthevatomsvofvthevmetalvwerevmostlyvemptyvspace,vwhilevthevnucleusvconsistedv
ofvmostvofvthevmassvwhichvincludedvhighlyvcondensedvpositivevparticlesv(whichvcaus
edvthevdeflection).
Anvatomvhasvavvalencevshellvconfigurationvofv1s1.vTovwhichvgroupvofvelementsvonvt
hevperiodicvtablevdoesvitvbelong?v-vcorrectvanswer-IA
alkalivmetals
electromagneticvspectrumv-vcorrectvanswer-
Thevgreatervthevwavelengthvofvavphoton..?v-vcorrectvanswer-thevlowervitsvfrequency
Thevgreatervthevfrequencyvofvavphoton...?v-vcorrectvanswer-
thevshortervitsvwavelength
Lightvenergyvformulav-vcorrectvanswer-
WhatvdoesvCvinvthevlightvenergyvformulavrepresent?v-vcorrectvanswer-
Givevthevground-statevelectronvconfigurationvofvanvatomvinvthevsecondvperiodv-
vcorrectvanswer-1s2v2s1
Electronsvconfigurationvrulevthatvstatesvelectronsvdovnotvpairvuntilvtheyvhavevto.v(putv
onevelectronsvinveachvelectronvdomainvthenvpairvup)v-vcorrectvanswer-Hund'svrule
Anvexperimentalvphenomenavassociatedvwithvatomsvhavingvunpairedvelectronsv-
vwhichvstatesvsuchvsubstancesvarevattractedvtovmagneticvfieldsv-vcorrectvanswer-
Paramagnetism
Whichvdropvinvenergyvlevelvresultsvinvthevgreatestvemissionvofvenergy?v-
vcorrectvanswer-n=2vtovn=1
quantumvnumbersv-vcorrectvanswer-
Whatvdovthev4vquantumvnumbersvstandvfor?v-vcorrectvanswer-nv=venergyvlevel
lv=v(n-1)
mlv-lvtovl
mnv1/2vorv-1/2v(spin)
Listvthevquantumvnumbersvforvthevs,vp,vd,vandvfvorbitalsv-vcorrectvanswer-sv1,0,0v
pv2,v1,v-1-0-1
dv3,v2,v-2--1-0-1-2
fv4,v3v-3--2--1-0-1-2-3
Pyvorbitalv-vcorrectvanswer-
WhichvelementvisvrepresentedvbyvXv-vcorrectvanswer-Chromium
EXAM WITH THE
CORRECT ANSWERS
Layoutvofvanvelementv(massv#v&vatomicv#)v-vcorrectvanswer-
atomicvnumberv=v-vcorrectvanswer-#vofvprotons
massvnumberv=v-vcorrectvanswer-#vofvprotonsv+vneutrons
thevnumbervofvprotonsvinvavneutralvatomvwillvequalvthev-vcorrectvanswer-
#vofvelectrons
howvtovfindvthevcorrectvnumbervofvneutronsv-vcorrectvanswer-massvnumberv-
vatomicvnumber
Formsvofvthevsamevelementsvthatvdiffervinvamountvofvneutronsv-vcorrectvanswer-
isotopes
Whatvparticle,vifvlostvfromvthevnucleus,vwouldvNOTvcausevavchangevinvthevatomicvnu
mber?v-vcorrectvanswer-avneutronvbecausevitvhasvnovcharge
Whenvalphavparticlesvwerevshotvatvavmetalvfoilvtarget,vmostvpassedvthroughvwithoutv
deflections,vwhilevothersvdeflectedvatvlargevangles.vWhatvdidvthisvsuggestvtovRutherf
, ord?v-vcorrectvanswer-
thatvthevatomsvofvthevmetalvwerevmostlyvemptyvspace,vwhilevthevnucleusvconsistedv
ofvmostvofvthevmassvwhichvincludedvhighlyvcondensedvpositivevparticlesv(whichvcaus
edvthevdeflection).
Anvatomvhasvavvalencevshellvconfigurationvofv1s1.vTovwhichvgroupvofvelementsvonvt
hevperiodicvtablevdoesvitvbelong?v-vcorrectvanswer-IA
alkalivmetals
electromagneticvspectrumv-vcorrectvanswer-
Thevgreatervthevwavelengthvofvavphoton..?v-vcorrectvanswer-thevlowervitsvfrequency
Thevgreatervthevfrequencyvofvavphoton...?v-vcorrectvanswer-
thevshortervitsvwavelength
Lightvenergyvformulav-vcorrectvanswer-
WhatvdoesvCvinvthevlightvenergyvformulavrepresent?v-vcorrectvanswer-
Givevthevground-statevelectronvconfigurationvofvanvatomvinvthevsecondvperiodv-
vcorrectvanswer-1s2v2s1
Electronsvconfigurationvrulevthatvstatesvelectronsvdovnotvpairvuntilvtheyvhavevto.v(putv
onevelectronsvinveachvelectronvdomainvthenvpairvup)v-vcorrectvanswer-Hund'svrule
Anvexperimentalvphenomenavassociatedvwithvatomsvhavingvunpairedvelectronsv-
vwhichvstatesvsuchvsubstancesvarevattractedvtovmagneticvfieldsv-vcorrectvanswer-
Paramagnetism
Whichvdropvinvenergyvlevelvresultsvinvthevgreatestvemissionvofvenergy?v-
vcorrectvanswer-n=2vtovn=1
quantumvnumbersv-vcorrectvanswer-
Whatvdovthev4vquantumvnumbersvstandvfor?v-vcorrectvanswer-nv=venergyvlevel
lv=v(n-1)
mlv-lvtovl
mnv1/2vorv-1/2v(spin)
Listvthevquantumvnumbersvforvthevs,vp,vd,vandvfvorbitalsv-vcorrectvanswer-sv1,0,0v
pv2,v1,v-1-0-1
dv3,v2,v-2--1-0-1-2
fv4,v3v-3--2--1-0-1-2-3
Pyvorbitalv-vcorrectvanswer-
WhichvelementvisvrepresentedvbyvXv-vcorrectvanswer-Chromium
