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d d d d d d d d d
Chapter 02: Radiation Physics
d d d
Iannucci:Dental Radiography, 6thEdition
(i d
MULTIPLEdCHOICE
1. Thedfundamentaldunitdofdmatterdisdthe
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:d d D
Adprotondisdadsubatomicdparticle.dAdneutrondisdadsubatomicdparticle.dAndelectrondisdadsubatomicdpardti
cle.dThedfundamentaldunitdofdmatterdisdthedatom.
DIF: Recall REF: Paged7 OBJ: 1
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
2. Thednucleusdofdandatomdcontains
a. protons.
b. neutrons.
c. protonsdanddneutrons.
d. electrons.
ANS:d d C
Thednucleusdofdandatomdcontainsdneutronsdasdwelldasdprotons.dThe nucleusdofdandatomdcontainsdprdot
(i
onsdasdwelldas neutrons.dThednucleusdofdandatomdcontainsdprotonsdanddneutrons.dThednucleusdofdandat
(i
omddoesdnotdcontaindelectrons;ditdcontainsdprotonsdanddneutrons.
DIF: Recall REF: Paged7 OBJ: 2
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
3. Whichdsubatomicdparticledcarriesdadnegativedelectricaldcharge?
a. Adneutron
b. Adproton
c. Andelectron
d. Adnucleon
ANS:d d C
Adneutronddoesdnotdcarrydandelectricaldcharge.dAdprotondcarries adpositivedelectricaldcharge.dAndeledc
(i
trondcarriesdadnegativedelectricaldcharge.dAdnucleondcarriesdadpositived(proton)dordnod(neutron)deldec
tricaldcharge.
DIF: Comprehension REF: Paged7
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
mynursytest.store
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d d d d d d d d d
4. Whichdofdthedfollowingdelementsdisdthedsimplestdatom?
a. Hydrogen (Hd#1) (i
b. Heliumd(Hed#2)
c. Nitrogend(Nd#7)
d. Oxygen (Od#8) (i
ANS:d d A
Atomic numbersdaredassigneddfromdsimplestdtodmostdcomplex.dHydrogendis thedsimplestdatom;dwitdhd
(i (i
adsingledproton,ditdhasdandatomicdnumberdofd1.dHeliumdhasdandatomicdnumberdofd2.
Nitrogendhasdandatomicdnumberdofd7.dOxygendhasdandatomicdnumberdofd8.
DIF: Comprehension REF: Page 7 (i
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
5. Whichdofdthedfollowingdstatementsdisdtruedofdorbitsdordshellsdindthedatom?
a. Protonsdtraveldarounddthednucleusdindwell-defineddshells.
b. Andatomdcontainsdinnumerabledshells.
c. Thedenergydleveldwithindeachdshelldisdthedsame.
d. Thedorbitingdshelldclosest todthednucleusdhasdthedhighestdenergydlevel.
(i
ANS:d d D
Electronsdtraveldarounddthednucleusdindwell-
defined shells.dAndatomdcontainsdadmaximumdofdseven shells.dEachdofdthedmaximumdsevendshellsdwi
(i (i
thindandatomdrepresentsda ddifferentdenergydlevel.dThedorbitingdshelldclosest todthednucleusdhasdthedhigh
( (i
estdenergydlevel.dThedK shelldisdthedorbiting shelldclosestdtodthe nucleus.
(i (i (i
DIF: Comprehension REF: Paged7
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
6. Thedbindingdenergydordbinding forcedofdandelectrondis (i
a. determined bydtheddistancedbetweendthedneutronsdanddprotonsdwithindthednucleus.
(i
b. determined bydtheddistancedbetween thedorbitingdelectronsdanddthednucleus.
(i (i
c. weakerdfordelectronsdlocateddindinnerdshellsdthandindouterdshells.
d. determineddbydthedatomicdnumber.
ANS:d d B
Thedbindingdenergydordbindingdforcedofdandelectrondisdnotddetermineddbydtheddistancedbetweendthded
neutronsdand protonsdwithindthednucleus.dThedbinding energydordbindingdforcedofdandelectrondisddet
(i (i
ermined bydtheddistancedbetweendthednucleusdanddthedorbitingdelectronsdand isddifferentdfordeadchds
(i (i
hell.dThedbindingdenergydordbindingdforcedofdandelectrondisdstrongerdfordelectronsdlocateddindidnnerd
shellsdthandfordouterdshells.dThedbindingdenergydisdnotddetermineddbydthedatomicdnumber.
DIF: Recall REF: Paged7 OBJ: 2 TOP: CDA,dN/A
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
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d d d d d d d d d
7. Whichdofdthedfollowingdstatementsdisdtruedofdionization?
a. Andatomdthatdgainsdandelectrondwilldhavedadnegativedcharge.
b. Andatomdthatdlosesdandelectrondwilldhavedadnegativedcharge.
c. Andatomdthatdlosesdandelectrondwilldhaveda positivedcharge. (i
d. Andatomdthatdgainsdandelectrondhasdadnegativedcharge,danddandatomdthatdlosesdandelde
ctron hasdadpositivedcharge.
(i
ANS:d d D
Thisdanswerdisdnot thedbestdanswer.dAndatom thatdgainsdandelectron hasdadnegativedcharge;dhowevde
(i (i (i
r,dandatomdthatdlosesdandelectrondhasdadpositivedcharge.dAndatomdthatdlosesdandelectrondwilldhavedadp
ositivedcharge.dAndatomdthatdlosesdandelectrondhasda positivedcharge;dhowever,dandatomdthatdgaidnsda
(i
ndelectrondhasdadnegativedcharge.dAndatomdthatdgainsdandelectrondwilldhavedadnegativedcharge,dandda
ndatom thatdlosesdandelectrondwilldhavedadpositivedcharge.dAndatomdthatdgainsdordlosesdandeldectron
(i (i
anddbecomesdelectricallydunbalanceddisdknowndasdandion.
DIF: Comprehension REF:
Paged9dOBJ: 3dTOP:
CDA,dN/A
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
8. Andiondpairdresultsdwhen
a. adprotondisdremoveddfromdandatom.
b. andelectrondisdremoveddfrom andatom. (i
c. adneutrondisdremoveddfromdandatom.
d. twodatomsdsharedadpairdofdelectrons.
ANS:d d B
Andiondpairdresultsdwhendandelectrondisdremoveddfrom andatomdratherdthandadproton.dWhendandelecdtr
(i
ondisdremoveddfrom andatomdindthedionizationdprocess,dandiondpairdresults.dThedatomdbecomesdthdedp
(i
ositivedion,danddthedejected electron becomesdthednegativedion.dAndiondpairdresultsdwhendandeldectr
(i (i
on isdremoveddfromdandatomdratherdthandadneutron.dAdmoleculedoccursdwhendtwodatomsdsharedadpair
(i
dofdelectrons.
DIF: Recall REF: Paged9 OBJ: 3
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
9. (1)dRadiationdisdthedemissiondanddpropagationdofdenergydthroughdspacedordadsubstancedindthedford
mdofdwavesdordparticles.d(2)dRadioactivitydcandbeddefined asdthedprocessdbydwhichdcertaindunstabdl
(i
edatomsdordelementsdundergodspontaneousddisintegration,dorddecay,dindandeffortdto attaindadmoredbdal (i
anceddnucleardstate.
a. Bothdstatementsdaredtrue.
b. Bothdstatementsdaredfalse.
c. Thedfirstdstatementdisdtrue;dthedseconddstatementdisdfalse.
d. Thedfirst statementdisdfalse;dthedseconddstatementdisdtrue.
(i
ANS:d d A
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d d d d d d d d d
Chapter 02: Radiation Physics
d d d
Iannucci:Dental Radiography, 6thEdition
(i d
MULTIPLEdCHOICE
1. Thedfundamentaldunitdofdmatterdisdthe
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:d d D
Adprotondisdadsubatomicdparticle.dAdneutrondisdadsubatomicdparticle.dAndelectrondisdadsubatomicdpardti
cle.dThedfundamentaldunitdofdmatterdisdthedatom.
DIF: Recall REF: Paged7 OBJ: 1
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
2. Thednucleusdofdandatomdcontains
a. protons.
b. neutrons.
c. protonsdanddneutrons.
d. electrons.
ANS:d d C
Thednucleusdofdandatomdcontainsdneutronsdasdwelldasdprotons.dThe nucleusdofdandatomdcontainsdprdot
(i
onsdasdwelldas neutrons.dThednucleusdofdandatomdcontainsdprotonsdanddneutrons.dThednucleusdofdandat
(i
omddoesdnotdcontaindelectrons;ditdcontainsdprotonsdanddneutrons.
DIF: Recall REF: Paged7 OBJ: 2
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
3. Whichdsubatomicdparticledcarriesdadnegativedelectricaldcharge?
a. Adneutron
b. Adproton
c. Andelectron
d. Adnucleon
ANS:d d C
Adneutronddoesdnotdcarrydandelectricaldcharge.dAdprotondcarries adpositivedelectricaldcharge.dAndeledc
(i
trondcarriesdadnegativedelectricaldcharge.dAdnucleondcarriesdadpositived(proton)dordnod(neutron)deldec
tricaldcharge.
DIF: Comprehension REF: Paged7
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
mynursytest.store
,DOWNLOADTHETestBankforDentalRadiography6thEditionIannucci
d d d d d d d d d
4. Whichdofdthedfollowingdelementsdisdthedsimplestdatom?
a. Hydrogen (Hd#1) (i
b. Heliumd(Hed#2)
c. Nitrogend(Nd#7)
d. Oxygen (Od#8) (i
ANS:d d A
Atomic numbersdaredassigneddfromdsimplestdtodmostdcomplex.dHydrogendis thedsimplestdatom;dwitdhd
(i (i
adsingledproton,ditdhasdandatomicdnumberdofd1.dHeliumdhasdandatomicdnumberdofd2.
Nitrogendhasdandatomicdnumberdofd7.dOxygendhasdandatomicdnumberdofd8.
DIF: Comprehension REF: Page 7 (i
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
5. Whichdofdthedfollowingdstatementsdisdtruedofdorbitsdordshellsdindthedatom?
a. Protonsdtraveldarounddthednucleusdindwell-defineddshells.
b. Andatomdcontainsdinnumerabledshells.
c. Thedenergydleveldwithindeachdshelldisdthedsame.
d. Thedorbitingdshelldclosest todthednucleusdhasdthedhighestdenergydlevel.
(i
ANS:d d D
Electronsdtraveldarounddthednucleusdindwell-
defined shells.dAndatomdcontainsdadmaximumdofdseven shells.dEachdofdthedmaximumdsevendshellsdwi
(i (i
thindandatomdrepresentsda ddifferentdenergydlevel.dThedorbitingdshelldclosest todthednucleusdhasdthedhigh
( (i
estdenergydlevel.dThedK shelldisdthedorbiting shelldclosestdtodthe nucleus.
(i (i (i
DIF: Comprehension REF: Paged7
OBJ: 2dTOP:
CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-
radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
6. Thedbindingdenergydordbinding forcedofdandelectrondis (i
a. determined bydtheddistancedbetweendthedneutronsdanddprotonsdwithindthednucleus.
(i
b. determined bydtheddistancedbetween thedorbitingdelectronsdanddthednucleus.
(i (i
c. weakerdfordelectronsdlocateddindinnerdshellsdthandindouterdshells.
d. determineddbydthedatomicdnumber.
ANS:d d B
Thedbindingdenergydordbindingdforcedofdandelectrondisdnotddetermineddbydtheddistancedbetweendthded
neutronsdand protonsdwithindthednucleus.dThedbinding energydordbindingdforcedofdandelectrondisddet
(i (i
ermined bydtheddistancedbetweendthednucleusdanddthedorbitingdelectronsdand isddifferentdfordeadchds
(i (i
hell.dThedbindingdenergydordbindingdforcedofdandelectrondisdstrongerdfordelectronsdlocateddindidnnerd
shellsdthandfordouterdshells.dThedbindingdenergydisdnotddetermineddbydthedatomicdnumber.
DIF: Recall REF: Paged7 OBJ: 2 TOP: CDA,dN/A
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
mynursytest.store
, DOWNLOADTHETestBankforDentalRadiography6thEditionIannucci
d d d d d d d d d
7. Whichdofdthedfollowingdstatementsdisdtruedofdionization?
a. Andatomdthatdgainsdandelectrondwilldhavedadnegativedcharge.
b. Andatomdthatdlosesdandelectrondwilldhavedadnegativedcharge.
c. Andatomdthatdlosesdandelectrondwilldhaveda positivedcharge. (i
d. Andatomdthatdgainsdandelectrondhasdadnegativedcharge,danddandatomdthatdlosesdandelde
ctron hasdadpositivedcharge.
(i
ANS:d d D
Thisdanswerdisdnot thedbestdanswer.dAndatom thatdgainsdandelectron hasdadnegativedcharge;dhowevde
(i (i (i
r,dandatomdthatdlosesdandelectrondhasdadpositivedcharge.dAndatomdthatdlosesdandelectrondwilldhavedadp
ositivedcharge.dAndatomdthatdlosesdandelectrondhasda positivedcharge;dhowever,dandatomdthatdgaidnsda
(i
ndelectrondhasdadnegativedcharge.dAndatomdthatdgainsdandelectrondwilldhavedadnegativedcharge,dandda
ndatom thatdlosesdandelectrondwilldhavedadpositivedcharge.dAndatomdthatdgainsdordlosesdandeldectron
(i (i
anddbecomesdelectricallydunbalanceddisdknowndasdandion.
DIF: Comprehension REF:
Paged9dOBJ: 3dTOP:
CDA,dN/A
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
8. Andiondpairdresultsdwhen
a. adprotondisdremoveddfromdandatom.
b. andelectrondisdremoveddfrom andatom. (i
c. adneutrondisdremoveddfromdandatom.
d. twodatomsdsharedadpairdofdelectrons.
ANS:d d B
Andiondpairdresultsdwhendandelectrondisdremoveddfrom andatomdratherdthandadproton.dWhendandelecdtr
(i
ondisdremoveddfrom andatomdindthedionizationdprocess,dandiondpairdresults.dThedatomdbecomesdthdedp
(i
ositivedion,danddthedejected electron becomesdthednegativedion.dAndiondpairdresultsdwhendandeldectr
(i (i
on isdremoveddfromdandatomdratherdthandadneutron.dAdmoleculedoccursdwhendtwodatomsdsharedadpair
(i
dofdelectrons.
DIF: Recall REF: Paged9 OBJ: 3
TOP:d d CDA,dRHS,dIII.B.2.dDescribedthedcharacteristicsdofdx-radiation
MSC:d NBDHE,d2.0dObtainingdanddInterpretingdRadiographsd|dNBDHE,d2.1dPrinciplesdofdRadiophysicsdand
ddRadiobiology
9. (1)dRadiationdisdthedemissiondanddpropagationdofdenergydthroughdspacedordadsubstancedindthedford
mdofdwavesdordparticles.d(2)dRadioactivitydcandbeddefined asdthedprocessdbydwhichdcertaindunstabdl
(i
edatomsdordelementsdundergodspontaneousddisintegration,dorddecay,dindandeffortdto attaindadmoredbdal (i
anceddnucleardstate.
a. Bothdstatementsdaredtrue.
b. Bothdstatementsdaredfalse.
c. Thedfirstdstatementdisdtrue;dthedseconddstatementdisdfalse.
d. Thedfirst statementdisdfalse;dthedseconddstatementdisdtrue.
(i
ANS:d d A
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