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RAD 102 - Radiation Science Exam 1 questions and answers 2024 University of Nevada, Las Vegas a +1 ion of Calcium-48 was used to produce element 115 (recently confirmed in Sweden). How many electrons does this ion have? - ANSW..19 a 10 mCi aliquot of Tc£14.64
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RAD 102 - Radiation Science Exam 1 questions and answers 2024 University of Nevada, Las Vegas a +1 ion of Calcium-48 was used to produce element 115 (recently confirmed in Sweden). How many electrons does this ion have? - ANSW..19 a 10 mCi aliquot of Tc
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Module
RAD 102 - Radiation Science
Institution
RAD 102 - Radiation Science
RAD 102 - Radiation Science Exam 1 questions and answers 2024 University of
Nevada, Las Vegas
a +1 ion of Calcium-48 was used to produce element 115 (recently confirmed in
Sweden). How many electrons does this ion have? - ANSW..19
a 10 mCi aliquot of Tc
RAD 102 - Radiation Science Exam 1 questions and answers 2024 University of
Nevada, Las Vegas
a +1 ion of Calcium-48 was used to produce element 115 (recently confirmed in
Sweden). How many electrons does this ion have? - ✔✔ANSW✔✔..19
a 10 mCi aliquot of Tc-99m is prepared at 8 a.m. on Tuesday but is not used. How
much activity remains at 8 a.m. on Wednesday? Half-life of Tc-99m is 6.01 hrs. -
✔✔ANSW✔✔..0.625 mCi
for the decay of Cu-64, what is the most likely decay mode to be observed? write the
complete decay reaction. - ✔✔ANSW✔✔..electron capture
for the electron capture branch on the far left (0.47%), what is the total energy released
by the electron capture decay (Q)? - ✔✔ANSW✔✔..1.675 MeV
Ga-68m decays by positron emission. what is the daughter of Ga-68m? -
✔✔ANSW✔✔..Zn-68
how many atoms of F-18 are in the 1 mCi sample? the half-life of F-18 is 109 minutes. -
✔✔ANSW✔✔..3.5 x 10^11 atoms
how many neutrons are in a Co-60 nucleus? - ✔✔ANSW✔✔..33
how many photons are emitted per second from 2.7 μCi of Cs-137 (1γ per decay)? -
✔✔ANSW✔✔..1.0 x 10⁵ photons/sec
if you prepare a 1600 MBq dose of F-18 at 6 a.m., what is the activity remaining at
11:30 a.m.? the half-life of F-18 is 109 minutes. - ✔✔ANSW✔✔..200 MBq
in 2012, Viking'r running back Adrian Peterson was 8 yards short of the rushing record.
To beat the record next year, how many more cm would he have to run? -
✔✔ANSW✔✔..732 cm
Ir-192 decays by beta emission. what is the daughter of Ir-192? - ✔✔ANSW✔✔..Pt-192
looking at the chart of nucleides, the line of stability curves downward as you go from
low to high z. why? - ✔✔ANSW✔✔..more neutrons are needed in the nucleus to
overcome the coulomb repulsion as the number of protons increases
, naturally-occuring radionuclides can be best classified as? - ✔✔ANSW✔✔..primordial
and cosmogenic
Ra-226 decays by alpha emission. what is the daughter of Ra-226? -
✔✔ANSW✔✔..Rn-222
radioactive decay is the _ transformation of one nucleus into another through the
emission of one or more particle and energy. - ✔✔ANSW✔✔..spontaneous
the decay constant is not...
a. inversely proportional to half-life
b. directly proportional to half-life
c. the probability of a nucleus decaying per unit of time
d. the number of nuclei decaying (ΔN) per unit time (Δt) - ✔✔ANSW✔✔..b. directly
proportional to half-life
the positron emission of Ga-68 has a Q value of 2.976 MeV. If there is NO gamma
emitted in this decay, what is the average energy of the positron emitted? -
✔✔ANSW✔✔..992 keV
a chocolatier has ordered 1 Mg (megagram) of Belgian chocolate. How many pounds
(US) will he receive? - ✔✔ANSW✔✔..2200 lb
a plastic scintillator measures a count rate of 150 cps for a 18.5 kBq source. what is the
efficiency of the detector in this geometry (total efficiency)? - ✔✔ANSW✔✔..0.8%
a researcher uses P-32 as a tracer in a cell culture experiment. to dispose of cells as
nonradioactive waste, the activity must be less than 1 Bq/g. If the experiment used
1,000 Bq/g, how long must the samples be stored before they can be sent to waste?
Half-life of P-32 is 14.3 days. - ✔✔ANSW✔✔..6 months
according to Bohr's model of the atom, which of the following particles can be found
inside the nucleus of the atom? - ✔✔ANSW✔✔..protons
an excited state of I-129 decays by internal conversion 60% of the time (40% by
gamma). what is the internal conversion coefficient (ICC) for this decay mode? -
✔✔ANSW✔✔..1.5
B-10 + N-1 -> He-4 + _? - ✔✔ANSW✔✔..Li-7
Cs-137 decays by beta minus emission to produce what? - ✔✔ANSW✔✔..Ba-137
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