, Chapter 01: Radiation Physics
z z z
MULTIPLEz CHOICE
1. Thezfundamentalz unitzofzmatterz isz the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:z D
Azprotonz iszazsubatomicz particle;z thezfundamentalz unitz ofzmatterz iszthezatom.z Azneutronziszazs
ubatomiczparticle;zthezfundamentalzunitzofzmatterziszthezatom.zAnzelectronziszazsubatomic
zparticle; zthezfundamental zunitzofzmatterziszthezatom.zThezfundamental z unitzofzm atterziszthez
atom.
DIF: Recall REF:zzz Pagez8 OBJ:z 1
TOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicsz ofz x-radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
2. Theznucleusz ofzanz atomzcontains
a. protons.
b. neutrons.
c. protonsz andz neutrons.
d. electrons.
ANS:z C
Theznucleuszofzanzatomzcontainszneutronszaszwellzaszprotons.zTheznucleuszofzanzatomzco
ntainszprotonszaszwellzaszneutrons.zTheznucleuszofzanzatomzcontainszprotonszandzneut
rons.zTheznucleuszofzanzatomzdoesznotzcontainzelectrons;zitzcontainszprotonszandzneutron
s.
DIF: Recall REF:zzz Pagez8 OBJ:z 2
TOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicsz ofz x-radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
, 3. Whichz subatomicz particlez carriesz az negativez electricalz charge?
a. Azneutron
b. Azproton
c. Anz electron
d. Aznucleon
ANS:z C
Azneutronz doesz notzcarryz anz electricalz charge.z Az protonz carriesz az positivez electricalz charge.zAnz e
lectronzcarrieszaznegativez electricalzcharge.z Az nucleonz carrieszazpositivez (proton)z or
noz (neutron)z electricalz charge.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
4. Whichzofz thez followingzelementsz isz thezsimplestz atom?
a. Hydrogenz (Hz #1)
b. Heliumz(Hez#2)
c. Nitrogenz (Nz#7)
d. Oxygenz (Oz #8)
ANS:z A
Atomicznumberszarezassignedzfromzsimplestztozmostzcomplex.zHydrogenziszthezsimplestzat
om;zwithzazsinglezproton,zitzhaszanzatomicznumberzofz1.zHeliumzhaszanzatomicznumberzofz2.z
Nitrogenz haszanz atomicznumberzofz7.z Oxygenz hasz anzatomicznumberzofz8.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofradiophysicszandzradiobiology
, 5. Whichzofz thez followingzstatementsz isz truezofz orbitsz orz shellszinzthezatom?
a. Protonsztravelz aroundztheznucleuszinz well-
definedzshells.
b. Anz atomz containsz innumerablez shells.
c. Thezenergyz levelz withinzeachzshellz iszthe
same.
d. Thezorbitingz shellz closestz toz thez nucleus
haszthez highestzenergyzlevel.
ANS:z D
Electronsztravelzaroundztheznucleuszinzwell-
definedzshells.zAnz atomzcontainszazmaximumzofzsevenzshells.zEachzofzthezmaximumzsevenzs
hellszwithinzanzatomzrepresentszazdifferentzenergyzlevel.zThezorbitingzshellzclosestztoztheznucl
euszhaszthezhighestzenergyzlevel.zThezKzshellziszthezorbitingzshellzclosestztoztheznucleus.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
6. Thezbindingz energyz orz bindingz forcez ofz anz electronz is
a. determinedz byzthezdistancezbetweenz the
neutronszandz protonsz withinz thez nucleus.
b. determinedz byzthezdistancezbetweenz the
orbitingz electronsz andz theznucleus.
c. weakerzforz electronszlocatedzinz inner
shellszthanz inzouterzshells.
d. determinedz byzthez atomicznumber.
ANS:z B
Thez bindingz energyz orz bindingz forcez ofz anz electronz isz determinedz byz thez distancez betweenzth
eznucleusz andz thez orbitingz electron.z Thezbindingz energyz orzbindingz forcez ofz anz electronziszde
terminedzbyzthezdistancezbetweenzthezorbitingzelectronzandztheznucleus,znotzthezdistancezbet
weenzthezorbitingzelectrons.zThezbindingzenergyzorzbindingzforcez ofz anzelectronziszstrongerz f
orz electronsz locatedz inzinnerzshellsz thanz forzouterzshells.
DIF: Recall REF:zzz Pagez8 OBJ:zzz 2 TOP:z CDA,z N/A
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofradiophysicszandzradiobiology
z z z
MULTIPLEz CHOICE
1. Thezfundamentalz unitzofzmatterz isz the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:z D
Azprotonz iszazsubatomicz particle;z thezfundamentalz unitz ofzmatterz iszthezatom.z Azneutronziszazs
ubatomiczparticle;zthezfundamentalzunitzofzmatterziszthezatom.zAnzelectronziszazsubatomic
zparticle; zthezfundamental zunitzofzmatterziszthezatom.zThezfundamental z unitzofzm atterziszthez
atom.
DIF: Recall REF:zzz Pagez8 OBJ:z 1
TOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicsz ofz x-radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
2. Theznucleusz ofzanz atomzcontains
a. protons.
b. neutrons.
c. protonsz andz neutrons.
d. electrons.
ANS:z C
Theznucleuszofzanzatomzcontainszneutronszaszwellzaszprotons.zTheznucleuszofzanzatomzco
ntainszprotonszaszwellzaszneutrons.zTheznucleuszofzanzatomzcontainszprotonszandzneut
rons.zTheznucleuszofzanzatomzdoesznotzcontainzelectrons;zitzcontainszprotonszandzneutron
s.
DIF: Recall REF:zzz Pagez8 OBJ:z 2
TOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicsz ofz x-radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
, 3. Whichz subatomicz particlez carriesz az negativez electricalz charge?
a. Azneutron
b. Azproton
c. Anz electron
d. Aznucleon
ANS:z C
Azneutronz doesz notzcarryz anz electricalz charge.z Az protonz carriesz az positivez electricalz charge.zAnz e
lectronzcarrieszaznegativez electricalzcharge.z Az nucleonz carrieszazpositivez (proton)z or
noz (neutron)z electricalz charge.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
4. Whichzofz thez followingzelementsz isz thezsimplestz atom?
a. Hydrogenz (Hz #1)
b. Heliumz(Hez#2)
c. Nitrogenz (Nz#7)
d. Oxygenz (Oz #8)
ANS:z A
Atomicznumberszarezassignedzfromzsimplestztozmostzcomplex.zHydrogenziszthezsimplestzat
om;zwithzazsinglezproton,zitzhaszanzatomicznumberzofz1.zHeliumzhaszanzatomicznumberzofz2.z
Nitrogenz haszanz atomicznumberzofz7.z Oxygenz hasz anzatomicznumberzofz8.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofradiophysicszandzradiobiology
, 5. Whichzofz thez followingzstatementsz isz truezofz orbitsz orz shellszinzthezatom?
a. Protonsztravelz aroundztheznucleuszinz well-
definedzshells.
b. Anz atomz containsz innumerablez shells.
c. Thezenergyz levelz withinzeachzshellz iszthe
same.
d. Thezorbitingz shellz closestz toz thez nucleus
haszthez highestzenergyzlevel.
ANS:z D
Electronsztravelzaroundztheznucleuszinzwell-
definedzshells.zAnz atomzcontainszazmaximumzofzsevenzshells.zEachzofzthezmaximumzsevenzs
hellszwithinzanzatomzrepresentszazdifferentzenergyzlevel.zThezorbitingzshellzclosestztoztheznucl
euszhaszthezhighestzenergyzlevel.zThezKzshellziszthezorbitingzshellzclosestztoztheznucleus.
DIF: Comprehension REF:zzz Pagez8
OBJ:z2zTOP:z CDA,zRHS,z III.B.2.z Describez thez characteristicszofzx-
radiation
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofzradiophysicsz
andzradiobiology
6. Thezbindingz energyz orz bindingz forcez ofz anz electronz is
a. determinedz byzthezdistancezbetweenz the
neutronszandz protonsz withinz thez nucleus.
b. determinedz byzthezdistancezbetweenz the
orbitingz electronsz andz theznucleus.
c. weakerzforz electronszlocatedzinz inner
shellszthanz inzouterzshells.
d. determinedz byzthez atomicznumber.
ANS:z B
Thez bindingz energyz orz bindingz forcez ofz anz electronz isz determinedz byz thez distancez betweenzth
eznucleusz andz thez orbitingz electron.z Thezbindingz energyz orzbindingz forcez ofz anz electronziszde
terminedzbyzthezdistancezbetweenzthezorbitingzelectronzandztheznucleus,znotzthezdistancezbet
weenzthezorbitingzelectrons.zThezbindingzenergyzorzbindingzforcez ofz anzelectronziszstrongerz f
orz electronsz locatedz inzinnerzshellsz thanz forzouterzshells.
DIF: Recall REF:zzz Pagez8 OBJ:zzz 2 TOP:z CDA,z N/A
MSC:z NBDHE,z 2.0z Obtainingz andz Interpretingz Radiographsz |z NBDHE,z 2.1z Principlesz ofradiophysicszandzradiobiology
