ACS CHEMISTRY FINAL EXAM QUESTIONS AND ANSWERS RATED A+ .pdf

ACS CHEMISTRY FINAL EXAM QUESTIONS AND
ANSWERS RATED A+ 2025-2026
LayoutYofYanYelementY(massY#Y&YatomicY#)Y-YCORRECTYANSWERS



atomicYnumberY=Y-YCORRECTYANSWERS#YofYprotons



massYnumberY=Y-YCORRECTYANSWERS#YofYprotonsY+Yneutrons



theYnumberYofYprotonsYinYaYneutralYatomYwillYequalYtheY-YCORRECTYANSWERS#YofYelectrons



howYtoYfindYtheYcorrectYnumberYofYneutronsY-YCORRECTYANSWERSmassYnumberY-YatomicYnumber



FormsYofYtheYsameYelementsYthatYdifferYinYamountYofYneutronsY-YCORRECTYANSWERSisotopes



WhatYparticle,YifYlostYfromYtheYnucleus,YwouldYNOTYcauseYaYchangeYinYtheYatomicYnumber?Y-
YCORRECTYANSWERSaYneutronYbecauseYitYhasYnoYcharge




WhenYalphaYparticlesYwereYshotYatYaYmetalYfoilYtarget,YmostYpassedYthroughYwithoutYdeflections,Y
whileYothersYdeflectedYatYlargeYangles.YWhatYdidYthisYsuggestYtoYRutherford?Y-
YCORRECTYANSWERSthatYtheYatomsYofYtheYmetalYwereYmostlyYemptyYspace,YwhileYtheYnucleusYcon


sistedYofYmostYofYtheYmassYwhichYincludedYhighlyYcondensedYpositiveYparticlesY(whichYcausedYtheY
deflection).



AnYatomYhasYaYvalenceYshellYconfigurationYofY1s1.YToYwhichYgroupYofYelementsYonYtheYperiodicYtabl
eYdoesYitYbelong?Y-YCORRECTYANSWERSIA

alkaliYmetals

,electromagneticYspectrumY-YCORRECTYANSWERS



TheYgreaterYtheYwavelengthYofYaYphoton..?Y-YCORRECTYANSWERStheYlowerYitsYfrequency



TheYgreaterYtheYfrequencyYofYaYphoton...?Y-YCORRECTYANSWERStheYshorterYitsYwavelength



LightYenergyYformulaY-YCORRECTYANSWERS



WhatYdoesYCYinYtheYlightYenergyYformulaYrepresent?Y-YCORRECTYANSWERS



GiveYtheYground-stateYelectronYconfigurationYofYanYatomYinYtheYsecondYperiodY-
YCORRECTYANSWERS1s2Y2s1




ElectronsYconfigurationYruleYthatYstatesYelectronsYdoYnotYpairYuntilYtheyYhaveYto.Y(putYoneYelectron
sYinYeachYelectronYdomainYthenYpairYup)Y-YCORRECTYANSWERSHund'sYrule



AnYexperimentalYphenomenaYassociatedYwithYatomsYhavingYunpairedYelectronsY-
YwhichYstatesYsuchYsubstancesYareYattractedYtoYmagneticYfieldsY-


YCORRECTYANSWERSParamagnetism




WhichYdropYinYenergyYlevelYresultsYinYtheYgreatestYemissionYofYenergy?Y-
YCORRECTYANSWERSn=2YtoYn=1




quantumYnumbersY-YCORRECTYANSWERS



WhatYdoYtheY4YquantumYnumbersYstandYfor?Y-YCORRECTYANSWERSnY=YenergyYlevel

lY=Y(n-1)

, mlY-lYtoYl

mnY1/2YorY-1/2Y(spin)



ListYtheYquantumYnumbersYforYtheYs,Yp,Yd,YandYfYorbitalsY-YCORRECTYANSWERSsY1,0,0Y

pY2,Y1,Y-1-0-1

dY3,Y2,Y-2--1-0-1-2

fY4,Y3Y-3--2--1-0-1-2-3



PyYorbitalY-YCORRECTYANSWERS



WhichYelementYisYrepresentedYbyYXY-YCORRECTYANSWERSChromium



WhatYtwoYsubatomicYparticlesYhaveYtheYmostYmass,YbutYoccupyYveryYlittleYofYtheYvolumeYofYanYato
mY-YCORRECTYANSWERSprotonsYandYneutrons



DefineYIsoelectronicY-YCORRECTYANSWERSHavingYtheYsameYamountYofYelectrons



HowYdoesYaYsodiumYionYdifferYfromYaYsodiumYatom?Y-
YCORRECTYANSWERStheYsodiumYionYhasYfewerYelectrons




twoYorYmoreYcompoundsYwithYtheYsameYformulaYbutYaYdifferentYarrangementYofYatomsYinYtheYmol
eculeYandYdifferentYpropertiesY-YCORRECTYANSWERSisomer



twoYorYmoreYdifferentYphysicalYformsYinYwhichYanYelementYcanYexist.YGraphite,Ycharcoal,YandYdiam
ondYareYallY________YofYcarbon.Y-YCORRECTYANSWERSallotropes



WhatYmakesYupYanYalphaYparticle?Y-YCORRECTYANSWERS2YprotonsYandY2Yneutrons