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q q q q q q q q q
Chapter 02: Radiation Physics
q q q
Iannucci: Dental Radiography, 6th Edition
q q q q
MULTIPLEqCHOICE
1. Theqfundamentalqunitqofqmatterqisqthe
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:q D
Aqprotonqisqaqsubatomicqparticle.qAqneutronqisqaqsubatomicqparticle.qAnqelectronqisqaqsubatomicqpa
rticle.qTheqfundamentalqunitqofqmatterqisqtheqatom.
DIF: Recall REF:q q Pageq7 OBJ:q q 1
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
2. Theqnucleusqofqanqatomqcontains
a. protons.
b. neutrons.
c. protonsqandqneutrons.
d. electrons.
ANS:q C
Theqnucleusqofqanqatomqcontainsqneutronsqasqwellqasqprotons.qTheqnucleusqofqanqatomqcontainsqp
rotonsqasqwellqasqneutrons.qTheqnucleusqofqanqatomqcontainsqprotonsqandqneutrons.qTheqnucleusq
ofqanqatomqdoesqnotqcontainqelectrons;qitqcontainsqprotonsqandqneutrons.
DIF: Recall REF:q q Pageq7 OBJ:q q 2
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
3. Whichqsubatomicqparticleqcarriesqaqnegativeqelectricalqcharge?
a. Aqneutron
b. Aqproton
c. Anqelectron
d. Aqnucleon
ANS:q C
Aqneutronqdoesqnotqcarryqanqelectricalqcharge.qAqprotonqcarriesqaqpositiveqelectricalqcharge.qAnqe
lectronqcarriesqaqnegativeqelectricalqcharge.qAqnucleonqcarriesqaqpositiveq(proton)qorqnoq(neutron
)qelectricalqcharge.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
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q q q q q q q q q
4. Whichqofqtheqfollowingqelementsqisqtheqsimplestqatom?
a. Hydrogenq(Hq#1)
b. Heliumq(Heq#2)
c. Nitrogenq(Nq#7)
d. Oxygenq(Oq#8)
ANS:q A
Atomicqnumbersqareqassignedqfromqsimplestqtoqmostqcomplex.qHydrogenqisqtheqsimplestqatom;q
withqaqsingleqproton,qitqhasqanqatomicqnumberqofq1.qHeliumqhasqanqatomicqnumberqofq2.
Nitrogenqhasqanqatomicqnumberqofq7.qOxygenqhasqanqatomicqnumberqofq8.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
5. Whichqofqtheqfollowingqstatementsqisqtrueqofqorbitsqorqshellsqinqtheqatom?
a. Protonsqtravelqaroundqtheqnucleusqinqwell-definedqshells.
b. Anqatomqcontainsqinnumerableqshells.
c. Theqenergyqlevelqwithinqeachqshellqisqtheqsame.
d. Theqorbitingqshellqclosestqtoqtheqnucleusqhasqtheqhighestqenergyqlevel.
ANS:q D
Electronsqtravelqaroundqtheqnucleusqinqwell-
definedqshells.qAnqatomqcontainsqaqmaximumqofqsevenqshells.qEachqofqtheqmaximumqsevenqshell
sqwithinqanqatomqrepresentsqaqdifferentqenergyqlevel.qTheqorbitingqshellqclosestqtoqtheqnucleusqhas
qtheqhighestqenergyqlevel.qTheqKqshellqisqtheqorbitingqshellqclosestqtoqtheqnucleus.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
6. Theqbindingqenergyqorqbindingqforceqofqanqelectronqis
a. determinedqbyqtheqdistanceqbetweenqtheqneutronsqandqprotonsqwithinqtheqnucleus.
b. determinedqbyqtheqdistanceqbetweenqtheqorbitingqelectronsqandqtheqnucleus.
c. weakerqforqelectronsqlocatedqinqinnerqshellsqthanqinqouterqshells.
d. determinedqbyqtheqatomicqnumber.
ANS:q B
Theqbindingqenergyqorqbindingqforceqofqanqelectronqisqnotqdeterminedqbyqtheqdistanceqbetweenqth
eqneutronsqandqprotonsqwithinqtheqnucleus.qTheqbindingqenergyqorqbindingqforceqofqanqelectronqis
qdeterminedqbyqtheqdistanceqbetweenqtheqnucleusqandqtheqorbitingqelectronsqandqisqdifferentqforqe
achqshell.qTheqbindingqenergyqorqbindingqforceqofqanqelectronqisqstrongerqforqelectronsqlocatedqinq
innerqshellsqthanqforqouterqshells.qTheqbindingqenergyqisqnotqdeterminedqbyqtheqatomicqnumber.
DIF: Recall REF:q q Pageq7 OBJ:q q 2 TOP:q CDA,qN/A
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
mynursytest.store
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7. Whichqofqtheqfollowingqstatementsqisqtrueqofqionization?
a. Anqatomqthatqgainsqanqelectronqwillqhaveqaqnegativeqcharge.
b. Anqatomqthatqlosesqanqelectronqwillqhaveqaqnegativeqcharge.
c. Anqatomqthatqlosesqanqelectronqwillqhaveqaqpositiveqcharge.
d. Anqatomqthatqgainsqanqelectronqhasqaqnegativeqcharge,qandqanqatomqthatqlosesqanqe
lectronqhasqaqpositiveqcharge.
ANS:q D
Thisqanswerqisqnotqtheqbestqanswer.qAnqatomqthatqgainsqanqelectronqhasqaqnegativeqcharge;qhoweve
r,qanqatomqthatqlosesqanqelectronqhasqaqpositiveqcharge.qAnqatomqthatqlosesqanqelectronqwillqhaveqaq
positiveqcharge.qAnqatomqthatqlosesqanqelectronqhasqaqpositiveqcharge;qhowever,qanqatomqthatqgain
sqanqelectronqhasqaqnegativeqcharge.qAnqatomqthatqgainsqanqelectronqwillqhaveqaqnegativeqcharge,qa
ndqanqatomqthatqlosesqanqelectronqwillqhaveqaqpositiveqcharge.qAnqatomqthatqgainsqorqlosesqanqelect
ronqandqbecomesqelectricallyqunbalancedqisqknownqasqanqion.
DIF: Comprehension REF:q Pageq9
OBJ:q 3qTOP:q CDA,qN/A
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
8. Anqionqpairqresultsqwhen
a. aqprotonqisqremovedqfromqanqatom.
b. anqelectronqisqremovedqfromqanqatom.
c. aqneutronqisqremovedqfromqanqatom.
d. twoqatomsqshareqaqpairqofqelectrons.
ANS:q B
Anqionqpairqresultsqwhenqanqelectronqisqremovedqfromqanqatomqratherqthanqaqproton.qWhenqanqele
ctronqisqremovedqfromqanqatomqinqtheqionizationqprocess,qanqionqpairqresults.qTheqatomqbecomesq
theqpositiveqion,qandqtheqejectedqelectronqbecomesqtheqnegativeqion.qAnqionqpairqresultsqwhenqanq
electronqisqremovedqfromqanqatomqratherqthanqaqneutron.qAqmoleculeqoccursqwhenqtwoqatomsqsha
reqaqpairqofqelectrons.
DIF: Recall REF:q q Pageq9 OBJ:q q 3
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
9. (1)qRadiationqisqtheqemissionqandqpropagationqofqenergyqthroughqspaceqorqaqsubstanceqinqtheqfor
mqofqwavesqorqparticles.q(2)qRadioactivityqcanqbeqdefinedqasqtheqprocessqbyqwhichqcertainqunstab
leqatomsqorqelementsqundergoqspontaneousqdisintegration,qorqdecay,qinqanqeffortqtoqattainqaqmoreq
balancedqnuclearqstate.
a. Bothqstatementsqareqtrue.
b. Bothqstatementsqareqfalse.
c. Theqfirstqstatementqisqtrue;qtheqsecondqstatementqisqfalse.
d. Theqfirstqstatementqisqfalse;qtheqsecondqstatementqisqtrue.
ANS:q A
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q q q q q q q q q
Chapter 02: Radiation Physics
q q q
Iannucci: Dental Radiography, 6th Edition
q q q q
MULTIPLEqCHOICE
1. Theqfundamentalqunitqofqmatterqisqthe
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:q D
Aqprotonqisqaqsubatomicqparticle.qAqneutronqisqaqsubatomicqparticle.qAnqelectronqisqaqsubatomicqpa
rticle.qTheqfundamentalqunitqofqmatterqisqtheqatom.
DIF: Recall REF:q q Pageq7 OBJ:q q 1
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
2. Theqnucleusqofqanqatomqcontains
a. protons.
b. neutrons.
c. protonsqandqneutrons.
d. electrons.
ANS:q C
Theqnucleusqofqanqatomqcontainsqneutronsqasqwellqasqprotons.qTheqnucleusqofqanqatomqcontainsqp
rotonsqasqwellqasqneutrons.qTheqnucleusqofqanqatomqcontainsqprotonsqandqneutrons.qTheqnucleusq
ofqanqatomqdoesqnotqcontainqelectrons;qitqcontainsqprotonsqandqneutrons.
DIF: Recall REF:q q Pageq7 OBJ:q q 2
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
3. Whichqsubatomicqparticleqcarriesqaqnegativeqelectricalqcharge?
a. Aqneutron
b. Aqproton
c. Anqelectron
d. Aqnucleon
ANS:q C
Aqneutronqdoesqnotqcarryqanqelectricalqcharge.qAqprotonqcarriesqaqpositiveqelectricalqcharge.qAnqe
lectronqcarriesqaqnegativeqelectricalqcharge.qAqnucleonqcarriesqaqpositiveq(proton)qorqnoq(neutron
)qelectricalqcharge.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
mynursytest.store
,DOWNLOAD THE Test Bank for Dental Radiography 6th Edition Iannucci
q q q q q q q q q
4. Whichqofqtheqfollowingqelementsqisqtheqsimplestqatom?
a. Hydrogenq(Hq#1)
b. Heliumq(Heq#2)
c. Nitrogenq(Nq#7)
d. Oxygenq(Oq#8)
ANS:q A
Atomicqnumbersqareqassignedqfromqsimplestqtoqmostqcomplex.qHydrogenqisqtheqsimplestqatom;q
withqaqsingleqproton,qitqhasqanqatomicqnumberqofq1.qHeliumqhasqanqatomicqnumberqofq2.
Nitrogenqhasqanqatomicqnumberqofq7.qOxygenqhasqanqatomicqnumberqofq8.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
5. Whichqofqtheqfollowingqstatementsqisqtrueqofqorbitsqorqshellsqinqtheqatom?
a. Protonsqtravelqaroundqtheqnucleusqinqwell-definedqshells.
b. Anqatomqcontainsqinnumerableqshells.
c. Theqenergyqlevelqwithinqeachqshellqisqtheqsame.
d. Theqorbitingqshellqclosestqtoqtheqnucleusqhasqtheqhighestqenergyqlevel.
ANS:q D
Electronsqtravelqaroundqtheqnucleusqinqwell-
definedqshells.qAnqatomqcontainsqaqmaximumqofqsevenqshells.qEachqofqtheqmaximumqsevenqshell
sqwithinqanqatomqrepresentsqaqdifferentqenergyqlevel.qTheqorbitingqshellqclosestqtoqtheqnucleusqhas
qtheqhighestqenergyqlevel.qTheqKqshellqisqtheqorbitingqshellqclosestqtoqtheqnucleus.
DIF: Comprehension REF:q Pageq7
OBJ:q 2qTOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx
-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
6. Theqbindingqenergyqorqbindingqforceqofqanqelectronqis
a. determinedqbyqtheqdistanceqbetweenqtheqneutronsqandqprotonsqwithinqtheqnucleus.
b. determinedqbyqtheqdistanceqbetweenqtheqorbitingqelectronsqandqtheqnucleus.
c. weakerqforqelectronsqlocatedqinqinnerqshellsqthanqinqouterqshells.
d. determinedqbyqtheqatomicqnumber.
ANS:q B
Theqbindingqenergyqorqbindingqforceqofqanqelectronqisqnotqdeterminedqbyqtheqdistanceqbetweenqth
eqneutronsqandqprotonsqwithinqtheqnucleus.qTheqbindingqenergyqorqbindingqforceqofqanqelectronqis
qdeterminedqbyqtheqdistanceqbetweenqtheqnucleusqandqtheqorbitingqelectronsqandqisqdifferentqforqe
achqshell.qTheqbindingqenergyqorqbindingqforceqofqanqelectronqisqstrongerqforqelectronsqlocatedqinq
innerqshellsqthanqforqouterqshells.qTheqbindingqenergyqisqnotqdeterminedqbyqtheqatomicqnumber.
DIF: Recall REF:q q Pageq7 OBJ:q q 2 TOP:q CDA,qN/A
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
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q q q q q q q q q
7. Whichqofqtheqfollowingqstatementsqisqtrueqofqionization?
a. Anqatomqthatqgainsqanqelectronqwillqhaveqaqnegativeqcharge.
b. Anqatomqthatqlosesqanqelectronqwillqhaveqaqnegativeqcharge.
c. Anqatomqthatqlosesqanqelectronqwillqhaveqaqpositiveqcharge.
d. Anqatomqthatqgainsqanqelectronqhasqaqnegativeqcharge,qandqanqatomqthatqlosesqanqe
lectronqhasqaqpositiveqcharge.
ANS:q D
Thisqanswerqisqnotqtheqbestqanswer.qAnqatomqthatqgainsqanqelectronqhasqaqnegativeqcharge;qhoweve
r,qanqatomqthatqlosesqanqelectronqhasqaqpositiveqcharge.qAnqatomqthatqlosesqanqelectronqwillqhaveqaq
positiveqcharge.qAnqatomqthatqlosesqanqelectronqhasqaqpositiveqcharge;qhowever,qanqatomqthatqgain
sqanqelectronqhasqaqnegativeqcharge.qAnqatomqthatqgainsqanqelectronqwillqhaveqaqnegativeqcharge,qa
ndqanqatomqthatqlosesqanqelectronqwillqhaveqaqpositiveqcharge.qAnqatomqthatqgainsqorqlosesqanqelect
ronqandqbecomesqelectricallyqunbalancedqisqknownqasqanqion.
DIF: Comprehension REF:q Pageq9
OBJ:q 3qTOP:q CDA,qN/A
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
8. Anqionqpairqresultsqwhen
a. aqprotonqisqremovedqfromqanqatom.
b. anqelectronqisqremovedqfromqanqatom.
c. aqneutronqisqremovedqfromqanqatom.
d. twoqatomsqshareqaqpairqofqelectrons.
ANS:q B
Anqionqpairqresultsqwhenqanqelectronqisqremovedqfromqanqatomqratherqthanqaqproton.qWhenqanqele
ctronqisqremovedqfromqanqatomqinqtheqionizationqprocess,qanqionqpairqresults.qTheqatomqbecomesq
theqpositiveqion,qandqtheqejectedqelectronqbecomesqtheqnegativeqion.qAnqionqpairqresultsqwhenqanq
electronqisqremovedqfromqanqatomqratherqthanqaqneutron.qAqmoleculeqoccursqwhenqtwoqatomsqsha
reqaqpairqofqelectrons.
DIF: Recall REF:q q Pageq9 OBJ:q q 3
TOP:q CDA,qRHS,qIII.B.2.qDescribeqtheqcharacteristicsqofqx-radiation
MSC:q NBDHE,q2.0qObtainingqandqInterpretingqRadiographsq|qNBDHE,q2.1qPrinciplesqofqRadiophysicsqa
ndqRadiobiology
9. (1)qRadiationqisqtheqemissionqandqpropagationqofqenergyqthroughqspaceqorqaqsubstanceqinqtheqfor
mqofqwavesqorqparticles.q(2)qRadioactivityqcanqbeqdefinedqasqtheqprocessqbyqwhichqcertainqunstab
leqatomsqorqelementsqundergoqspontaneousqdisintegration,qorqdecay,qinqanqeffortqtoqattainqaqmoreq
balancedqnuclearqstate.
a. Bothqstatementsqareqtrue.
b. Bothqstatementsqareqfalse.
c. Theqfirstqstatementqisqtrue;qtheqsecondqstatementqisqfalse.
d. Theqfirstqstatementqisqfalse;qtheqsecondqstatementqisqtrue.
ANS:q A
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