, Chapter 01: Radiation Physics
m m m
MULTIPLEm CHOICE
1. Themfundamentalm unitmofmmatterm ism the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:m D
Amprotonm ismamsubatomicmparticle;m themfundamentalmunitm ofmmatterm ism thematom.m Am neutron
m ism
amsubatomicmparticle;mthemfundamentalmunitmofmmattermismthematom.mAnmelectronmisma
m subatomicmparticle; mthemfundamental munitmofmmattermismthematom. mThe mfundamental m uni
tmofmmattermismthematom.
DIF: Recall REF:mmm Pagem8 OBJ:m 1
TOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsm ofm x-radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
2. Themnucleusm ofmanm atommcontains
a. protons.
b. neutrons.
c. protonsm andm neutrons.
d. electrons.
ANS:m C
Themnucleusmofmanmatommcontainsmneutronsmasmwellmasmprotons.mThemnucleusmofmanmato
mmcontainsmprotonsmasmwellmasmneutrons.mThemnucleusmofmanmatommcontainsmproton
smandmneutrons.mThemnucleusmofmanmatommdoesmnotmcontainmelectrons;mitmcontainsmproto
nsmandmneutrons.
DIF: Recall REF:mmm Pagem8 OBJ:m 2
TOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsm ofm x-radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
, 3. Whichm subatomicm particlem carriesm am negativem electricalm charge?
a. Amneutron
b. Amproton
c. Anm electron
d. Amnucleon
ANS:m C
Amneutronm doesm notmcarrymanm electricalm charge.m Am protonm carriesmam positivem electricalm charge
.mAnmelectronmcarriesmamnegativem electricalmcharge.m Am nucleonm carriesmampositivem (proton)m or
nom (neutron)m electricalm charge.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
4. Whichmofm them followingmelementsm ism themsimplestm atom?
a. Hydrogenm (Hm #1)
b. Heliumm(Hem #2)
c. Nitrogenm (Nm#7)
d. Oxygenm (Om #8)
ANS:m A
Atomicmnumbersmaremassignedmfrommsimplestmtommostmcomplex.mHydrogenmismthemsimple
stmatom;mwithmamsinglemproton,mitmhasmanmatomicmnumbermofm1.mHeliummhasmanmatomicmnu
mbermofm2.m Nitrogenm hasmanm atomicmnumbermofm7.m Oxygenm hasm anmatomicmnumbermofm8.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofradiophysicsmandmradiobiology
, 5. Whichmofm them followingmstatementsm ism truemofm orbitsm ormshellsminmthematom?
a. Protonsmtravelm aroundmthem nucleusminm well-
definedmshells.
b. Anm atomm containsminnumerablem shells.
c. Themenergym levelm withinmeachmshellm ismthe
same.
d. Themorbitingm shellmclosestm tom them nucleus
hasmthem highestmenergymlevel.
ANS:m D
Electronsmtravelmaroundmthemnucleusminmwell-
definedmshells.mAnm atommcontainsmammaximummofmsevenmshells.mEachmofmthemmaximummse
venmshellsmwithinmanmatommrepresentsmamdifferentmenergymlevel.mThemorbitingmshellmclosestmt
omthemnucleusmhasmthemhighestmenergymlevel.mThemKmshellmismthemorbitingmshellmclosestmtomth
emnucleus.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
6. Thembindingm energym orm bindingm forcem ofm anm electronm is
a. determinedm bymthemdistancembetweenm the
neutronsmandm protonsm withinm them nucleus.
b. determinedm bymthemdistancembetweenm the
orbitingm electronsmandm themnucleus.
c. weakermform electronsm locatedm inminner
shellsmthanm inmoutermshells.
d. determinedm bymthem atomicm number.
ANS:m B
Them bindingm energym orm bindingm forcem ofm anm electronm ism determinedm bym them distancem betw
eenmthemnucleusm andm them orbitingm electron.m Thembindingm energym ormbindingm forcem ofm anmel
ectronmismdeterminedmbymthemdistancembetweenmthemorbitingmelectronmandmthemnucleus,mnotmt
hemdistancembetweenmthemorbitingmelectrons.mThembindingmenergymormbindingmforcem ofm anm
electronmismstrongerm formelectronsmlocatedm inm innermshellsm thanm form outermshells.
DIF: Recall REF:mmm Pagem8 OBJ:mmm 2 TOP:m CDA,mN/A
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofradiophysicsmandmradiobiology
m m m
MULTIPLEm CHOICE
1. Themfundamentalm unitmofmmatterm ism the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:m D
Amprotonm ismamsubatomicmparticle;m themfundamentalmunitm ofmmatterm ism thematom.m Am neutron
m ism
amsubatomicmparticle;mthemfundamentalmunitmofmmattermismthematom.mAnmelectronmisma
m subatomicmparticle; mthemfundamental munitmofmmattermismthematom. mThe mfundamental m uni
tmofmmattermismthematom.
DIF: Recall REF:mmm Pagem8 OBJ:m 1
TOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsm ofm x-radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
2. Themnucleusm ofmanm atommcontains
a. protons.
b. neutrons.
c. protonsm andm neutrons.
d. electrons.
ANS:m C
Themnucleusmofmanmatommcontainsmneutronsmasmwellmasmprotons.mThemnucleusmofmanmato
mmcontainsmprotonsmasmwellmasmneutrons.mThemnucleusmofmanmatommcontainsmproton
smandmneutrons.mThemnucleusmofmanmatommdoesmnotmcontainmelectrons;mitmcontainsmproto
nsmandmneutrons.
DIF: Recall REF:mmm Pagem8 OBJ:m 2
TOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsm ofm x-radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
, 3. Whichm subatomicm particlem carriesm am negativem electricalm charge?
a. Amneutron
b. Amproton
c. Anm electron
d. Amnucleon
ANS:m C
Amneutronm doesm notmcarrymanm electricalm charge.m Am protonm carriesmam positivem electricalm charge
.mAnmelectronmcarriesmamnegativem electricalmcharge.m Am nucleonm carriesmampositivem (proton)m or
nom (neutron)m electricalm charge.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
4. Whichmofm them followingmelementsm ism themsimplestm atom?
a. Hydrogenm (Hm #1)
b. Heliumm(Hem #2)
c. Nitrogenm (Nm#7)
d. Oxygenm (Om #8)
ANS:m A
Atomicmnumbersmaremassignedmfrommsimplestmtommostmcomplex.mHydrogenmismthemsimple
stmatom;mwithmamsinglemproton,mitmhasmanmatomicmnumbermofm1.mHeliummhasmanmatomicmnu
mbermofm2.m Nitrogenm hasmanm atomicmnumbermofm7.m Oxygenm hasm anmatomicmnumbermofm8.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofradiophysicsmandmradiobiology
, 5. Whichmofm them followingmstatementsm ism truemofm orbitsm ormshellsminmthematom?
a. Protonsmtravelm aroundmthem nucleusminm well-
definedmshells.
b. Anm atomm containsminnumerablem shells.
c. Themenergym levelm withinmeachmshellm ismthe
same.
d. Themorbitingm shellmclosestm tom them nucleus
hasmthem highestmenergymlevel.
ANS:m D
Electronsmtravelmaroundmthemnucleusminmwell-
definedmshells.mAnm atommcontainsmammaximummofmsevenmshells.mEachmofmthemmaximummse
venmshellsmwithinmanmatommrepresentsmamdifferentmenergymlevel.mThemorbitingmshellmclosestmt
omthemnucleusmhasmthemhighestmenergymlevel.mThemKmshellmismthemorbitingmshellmclosestmtomth
emnucleus.
DIF: Comprehension REF:mmm Pagem8
OBJ:m2mTOP:m CDA,m RHS,m III.B.2.m Describem them characteristicsmofmx-
radiation
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofmradiop
hysicsmandmradiobiology
6. Thembindingm energym orm bindingm forcem ofm anm electronm is
a. determinedm bymthemdistancembetweenm the
neutronsmandm protonsm withinm them nucleus.
b. determinedm bymthemdistancembetweenm the
orbitingm electronsmandm themnucleus.
c. weakermform electronsm locatedm inminner
shellsmthanm inmoutermshells.
d. determinedm bymthem atomicm number.
ANS:m B
Them bindingm energym orm bindingm forcem ofm anm electronm ism determinedm bym them distancem betw
eenmthemnucleusm andm them orbitingm electron.m Thembindingm energym ormbindingm forcem ofm anmel
ectronmismdeterminedmbymthemdistancembetweenmthemorbitingmelectronmandmthemnucleus,mnotmt
hemdistancembetweenmthemorbitingmelectrons.mThembindingmenergymormbindingmforcem ofm anm
electronmismstrongerm formelectronsmlocatedm inm innermshellsm thanm form outermshells.
DIF: Recall REF:mmm Pagem8 OBJ:mmm 2 TOP:m CDA,mN/A
MSC:m NBDHE,m 2.0m Obtainingm andm Interpretingm Radiographsm |m NBDHE,m 2.1m Principlesm ofradiophysicsmandmradiobiology
