, Chapter 01: Radiation Physics
b b b
MULTIPLEb CHOICE
1. Thebfundamentalb unitbofb matterb isb the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:b D
Abprotonbisbabsubatomicbparticle;b thebfundamentalbunitbofbmatterb isbthebatom.b Abneutronbisbab
subatomicbparticle;bthebfundamentalbunitbofbmatterbisbthebatom.bAnbelectronbisbabsubatom
icbparticle;bthebfundamentalbunitbofbmatterbisbthebatom.bThebfundamentalb unitbofbmatterbisbt
hebatom.
DIF: Recall REF:bbb Pageb8 OBJ:b 1
TOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsb ofb x-radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
2. Thebnucleusb ofbanb atombcontains
a. protons.
b. neutrons.
c. protonsb andbneutrons.
d. electrons.
ANS:b C
Thebnucleusbofbanbatombcontainsbneutronsbasbwellbasbprotons.bThebnucleusbofbanbatombc
ontainsbprotonsbasbwellbasbneutrons.bThebnucleusbofbanbatombcontainsbprotonsbandbne
utrons.bThebnucleusbofbanbatombdoesbnotbcontainbelectrons;bitbcontainsbprotonsbandbneut
rons.
DIF: Recall REF:bbb Pageb8 OBJ:b 2
TOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsb ofb x-radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
, 3. Whichb subatomicb particleb carriesb ab negativeb electricalb charge?
a. Abneutron
b. Abproton
c. Anbelectron
d. Abnucleon
ANS:b C
Abneutronb doesbnotbcarrybanb electricalbcharge.b Abprotonbcarriesbabpositiveb electricalb charge.bAnb
electronbcarriesbabnegativebelectricalbcharge.b Abnucleonb carriesbabpositiveb(proton)b or
nob (neutron)b electricalb charge.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
4. Whichbofb theb followingbelementsb isb thebsimplestb atom?
a. Hydrogenb (Hb#1)
b. Heliumb(Heb#2)
c. Nitrogenb (Nb#7)
d. Oxygenb(Ob#8)
ANS:b A
Atomicbnumbersbarebassignedbfrombsimplestbtobmostbcomplex.bHydrogenbisbthebsimplestbat
om;bwithbabsinglebproton,bitbhasbanbatomicbnumberbofb1.bHeliumbhasbanbatomicbnumberbofb2
.bNitrogenbhasbanbatomicbnumberbofb7.b Oxygenbhasb anbatomicbnumberbofb8.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofradiophysicsbandbradiobiology
, 5. Whichbofb theb followingbstatementsb isb trueb ofborbitsb orb shellsbinbthebatom?
a. Protonsbtravelb aroundbthebnucleusbinb well-
definedbshells.
b. Anb atombcontainsbinnumerableb shells.
c. Thebenergyblevelbwithinbeachbshellbisbthe
same.
d. Theborbitingb shellbclosestbtobthebnucleus
hasbthebhighestbenergyblevel.
ANS:b D
Electronsbtravelbaroundbthebnucleusbinbwell-
definedbshells.bAnb atombcontainsbabmaximumbofbsevenbshells.bEachbofbthebmaximumbsevenb
shellsbwithinbanbatombrepresentsbabdifferentbenergyblevel.bTheborbitingbshellbclosestbtobthebnu
cleusbhasbthebhighestbenergyblevel.bThebKbshellbisbtheborbitingbshellbclosestbtobthebnucleus.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
6. Thebbindingb energyb orb bindingb forceb ofb anb electronb is
a. determinedb bybthebdistancebbetweenb the
neutronsbandb protonsb withinb thebnucleus.
b. determinedb bybthebdistancebbetweenb the
orbitingbelectronsbandb thebnucleus.
c. weakerbforbelectronsblocatedbinbinner
shellsbthanbinbouterbshells.
d. determinedb bybtheb atomicbnumber.
ANS:b B
Theb bindingb energyborb bindingb forcebofb anb electronb isbdeterminedb bybtheb distanceb betweenbt
hebnucleusb andbtheborbitingb electron.b Thebbindingb energyb orbbindingb forcebofb anbelectronbisb
determinedbbybthebdistancebbetweenbtheborbitingbelectronbandbthebnucleus,bnotbthebdistancebb
etweenbtheborbitingbelectrons.bThebbindingbenergyborbbindingbforceb ofb anbelectronbisbstrong
erbforbelectronsblocatedbinbinnerbshellsbthanbforbouterbshells.
DIF: Recall REF:bbb Pageb8 OBJ:bbb 2 TOP:b CDA,b N/A
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofradiophysicsbandbradiobiology
b b b
MULTIPLEb CHOICE
1. Thebfundamentalb unitbofb matterb isb the
a. proton.
b. neutron.
c. electron.
d. atom.
ANS:b D
Abprotonbisbabsubatomicbparticle;b thebfundamentalbunitbofbmatterb isbthebatom.b Abneutronbisbab
subatomicbparticle;bthebfundamentalbunitbofbmatterbisbthebatom.bAnbelectronbisbabsubatom
icbparticle;bthebfundamentalbunitbofbmatterbisbthebatom.bThebfundamentalb unitbofbmatterbisbt
hebatom.
DIF: Recall REF:bbb Pageb8 OBJ:b 1
TOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsb ofb x-radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
2. Thebnucleusb ofbanb atombcontains
a. protons.
b. neutrons.
c. protonsb andbneutrons.
d. electrons.
ANS:b C
Thebnucleusbofbanbatombcontainsbneutronsbasbwellbasbprotons.bThebnucleusbofbanbatombc
ontainsbprotonsbasbwellbasbneutrons.bThebnucleusbofbanbatombcontainsbprotonsbandbne
utrons.bThebnucleusbofbanbatombdoesbnotbcontainbelectrons;bitbcontainsbprotonsbandbneut
rons.
DIF: Recall REF:bbb Pageb8 OBJ:b 2
TOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsb ofb x-radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
, 3. Whichb subatomicb particleb carriesb ab negativeb electricalb charge?
a. Abneutron
b. Abproton
c. Anbelectron
d. Abnucleon
ANS:b C
Abneutronb doesbnotbcarrybanb electricalbcharge.b Abprotonbcarriesbabpositiveb electricalb charge.bAnb
electronbcarriesbabnegativebelectricalbcharge.b Abnucleonb carriesbabpositiveb(proton)b or
nob (neutron)b electricalb charge.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
4. Whichbofb theb followingbelementsb isb thebsimplestb atom?
a. Hydrogenb (Hb#1)
b. Heliumb(Heb#2)
c. Nitrogenb (Nb#7)
d. Oxygenb(Ob#8)
ANS:b A
Atomicbnumbersbarebassignedbfrombsimplestbtobmostbcomplex.bHydrogenbisbthebsimplestbat
om;bwithbabsinglebproton,bitbhasbanbatomicbnumberbofb1.bHeliumbhasbanbatomicbnumberbofb2
.bNitrogenbhasbanbatomicbnumberbofb7.b Oxygenbhasb anbatomicbnumberbofb8.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofradiophysicsbandbradiobiology
, 5. Whichbofb theb followingbstatementsb isb trueb ofborbitsb orb shellsbinbthebatom?
a. Protonsbtravelb aroundbthebnucleusbinb well-
definedbshells.
b. Anb atombcontainsbinnumerableb shells.
c. Thebenergyblevelbwithinbeachbshellbisbthe
same.
d. Theborbitingb shellbclosestbtobthebnucleus
hasbthebhighestbenergyblevel.
ANS:b D
Electronsbtravelbaroundbthebnucleusbinbwell-
definedbshells.bAnb atombcontainsbabmaximumbofbsevenbshells.bEachbofbthebmaximumbsevenb
shellsbwithinbanbatombrepresentsbabdifferentbenergyblevel.bTheborbitingbshellbclosestbtobthebnu
cleusbhasbthebhighestbenergyblevel.bThebKbshellbisbtheborbitingbshellbclosestbtobthebnucleus.
DIF: Comprehension REF:bbb Pageb8
OBJ:b2bTOP:b CDA,b RHS,b III.B.2.b Describeb theb characteristicsbofbx-
radiation
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofbradiophysi
csbandbradiobiology
6. Thebbindingb energyb orb bindingb forceb ofb anb electronb is
a. determinedb bybthebdistancebbetweenb the
neutronsbandb protonsb withinb thebnucleus.
b. determinedb bybthebdistancebbetweenb the
orbitingbelectronsbandb thebnucleus.
c. weakerbforbelectronsblocatedbinbinner
shellsbthanbinbouterbshells.
d. determinedb bybtheb atomicbnumber.
ANS:b B
Theb bindingb energyborb bindingb forcebofb anb electronb isbdeterminedb bybtheb distanceb betweenbt
hebnucleusb andbtheborbitingb electron.b Thebbindingb energyb orbbindingb forcebofb anbelectronbisb
determinedbbybthebdistancebbetweenbtheborbitingbelectronbandbthebnucleus,bnotbthebdistancebb
etweenbtheborbitingbelectrons.bThebbindingbenergyborbbindingbforceb ofb anbelectronbisbstrong
erbforbelectronsblocatedbinbinnerbshellsbthanbforbouterbshells.
DIF: Recall REF:bbb Pageb8 OBJ:bbb 2 TOP:b CDA,b N/A
MSC:b NBDHE,b 2.0b Obtainingb andb Interpretingb Radiographsb |b NBDHE,b 2.1b Principlesb ofradiophysicsbandbradiobiology
