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A) B
B) N
C) C
D) O
E) none of the above
6) In balancing the nuclear reaction Br → E + e, the identity of element E is ________.
A) Kr
B) Br
C) U
D) Se
E) none of the above
7) This reaction is an example of ________.
Po → Pb + _____
A) alpha decay
B) beta emission
C) gamma emission
D) positron emission
E) electron capture
8) The missing product from this reaction is ________.
I → Te + _____
A) He
B) e
C) n
D) e
E) γ
9) The missing product from this reaction is ________.
Cl + _____ → Ar + e
A) He
B) e
C) n
D) e
E) γ
10) The missing product from this reaction is ________.
Al + n → Si + _____
A) He
B) e
C) n
D) e
E) γ
11) The missing product from this reaction is ________.
B + _____ → N + n
A) He
B) e
C) n
D) e
E) γ
12) The missing product from this reaction is ________.
Fr → N + _____
A) He
B) e
C) n
D) e
E) γ
13) The missing product from this reaction is ________.
I → _____ + e
A) Te
B) Xe
C) Te
D) e
E) none of the above
14) The missing product from this reaction is ________.
Na → _____ + e
A) Na
B) Mg
C) Mg
D) Ne
E) Ne
15) The missing product from this reaction is ________.
Se + e → _____
A) Se
B) As
C) Se
D) Br
E) none of the above
16) The missing product from this reaction is ________.
Np → Pa + _____
A) He
B) e
C) n
D) e
E) γ
17) This reaction is an example of ________.
Ca → K + _____
A) alpha decay
B) beta decay
C) positron decay
D) electron capture
E) gamma emission
18) This reaction is an example of ________.
Kr → Rb + _____
A) alpha decay
B) beta decay
C) positron decay
D) electron capture
E) gamma emission
19) This reaction is an example of ________.
P → Si + _____
A) alpha decay
B) beta decay
C) positron decay
D) electron capture
E) gamma emission
20) This reaction is an example of ________.
P + _____ → Si
A) alpha decay
B) beta decay
C) positron decay
D) electron capture
E) gamma emission
21) The missing product in this reaction would be found in which group of the periodic table?
Na → e + _____
A) 1A
B) 2A
C) 3A
D) 8A
E) 7A
22) The missing product in this reaction combines with oxygen to form a compound with the formula
________.
K → e + _____
A) M2O
B) MO
C) MO2
D) M2O3
E) M3O2
23) Radium undergoes alpha decay. The product of this reaction also undergoes alpha decay. What is the
product of this second decay reaction?
A) Po
B) Rn
C) U
D) Th
E) Hg
24) 41Ca decays by electron capture. The product of this reaction undergoes alpha decay. What is the
product of this second decay reaction?
A) Ti
B) Ca
C) Ar
D) Cl
E) Sc
25) What is the mass number of a neutron?
A) 2
B) 1
C) 3
D) 4
E) 0
26) Nuclei above the belt of stability can lower their neutron-to-proton ratio by ________.
A) beta emission
B) gamma emission
C) positron emission
D) electron capture
E) Any of the above processes will lower the neutron-to-proton ratio.
27) What is the largest number of protons that can exist in a nucleus and still be stable?
A) 206
B) 50
C) 92
D) 83
E) 84
28) The three radioactive series that occur in nature end with what element?
A) Bi
B) U
C) Po
D) Pb
E) Hg
29) The largest number of stable nuclei have an ________ number of protons and an ________ number of
neutrons.
A) even, even
B) odd, odd
C) even, odd
D) odd, even
E) even, equal
30) In the nuclear transmutation represented by O(p, α) N, the emitted particle is ________.
A) a beta particle.
B) an alpha particle.
C) a proton.
D) a positron.
E) a neutron.
31) Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and ________.
A) zirconium-98.
B) krypton-101.
C) krypton-103.
D) strontium-99.
E) zirconium-99.
32) The reaction shown below is responsible for creating 14C in the atmosphere. What is the bombarding
particle?
N + _____ → C + H
A) alpha particle
B) electron
C) neutron
D) positron
E) proton
33) How many neutrons are emitted when a californium-249 nucleus (Z=98) is bombarded with a carbon-
12 nucleus to produce a Rf nucleus?
A) one
B) three
C) two
D) four
E) zero
34) How many neutrons are emitted when a californium-249 nucleus (Z=98) is bombarded with a
nitrogen-15 nucleus to produce a Db nucleus?
A) two
B) three
C) four
D) one
E) zero
35) What order process is radioactive decay?
A) zeroth
B) first
C) second
D) third
E) fourth
36) Due to the nature of the positron, ________ is actually detected in positron emission tomography.
A) alpha radiation
B) beta radiation
C) gamma radiation
D) x-ray emission
E) neutron emission
37) The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in
amu) of a Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)
A) 27.7830
B) 0.5489
C) 0.5405
D) 0.0662
E) 0.4827
38) What is the typical percent of uranium-235 in the enriched UO2 pellets used in nuclear reactors?
A) 0.7
B) 1
C) 3
D) 10
E) 14
39) On average, ________ neutrons are produced by every fission of a uranium-235 nucleus.
A) 4
B) 3.5
C) 1
D) 2.4
E) 2
40) What drives the turbine in a nuclear power plant?
A) the moderator
B) steam
C) the control rods
D) the primary coolant
E) UF6 gas
41) Who is credited with first achieving fission of uranium-235?
A) Fermi
B) Rutherford
C) Curie
D) Dalton
E) Faraday
42) When ionizing radiation enters the body, what is the predominant free radical produced?
A) H
B) H3O
C) protein
D) OH
E) H2O
43) The nuclear disintegration series of ________ is the source of radon-222 in soil.
A) 235U
B) 238U
C) 236Pb
D) 235Th
E) 14C
1) What happens to the mass number and the atomic number of an element when it undergoes alpha
decay?
A) The mass number decreases by 4 and the atomic number decreases by 2.
B) The mass number does not change and the atomic number increases by 1.
C) The mass number increases by 4 and the atomic number does not change.
D) The mass number increases by 2 and the atomic number decreases by 1.
E) The mass number does not change and the atomic number increases by 2.
2) Which one of the following is a correct representation of beta particle?
A) e
B) γ
C) e
D) He
3) Which one of the following processes results in a decrease in the number of neutrons?
A) alpha emission
B) gamma emission
C) positron emission
D) corrosion
E) electron capture
4) In what type of radioactive decay does the atomic number of the product decrease by one?
A) positron emission
B) corrosion
C) alpha
D) beta
E) gamma
5) What is the missing product from this reaction?
P → S + _____
A) e
B) γ
C) e
D) He
E) P
