Question 1

Which nuclide below is most likely to decay by electron capture?

Accepted Answer

A)    Re 
B)    Re 
C)    Re 
D)    Re 
A)    Re 
B)    Re 
C)    Re 
D)    Re A

Question 2

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 2.00 y., the activity of the sample declines to 3115 disintegrations per second. The   of   is

Accepted Answer

A)  0.157 
B)  2.13 
C)  32.6 
D)  1.88 
E)  22.6 
A)  0.157 
B)  2.13 
C)  32.6 
D)  1.88 
E)  22.6 E

Question 3

Match the following.
-electron

Accepted Answer

A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e 
A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e A

Question 4

Determine the identity of the daughter nuclide from the electron capture by   Rb.

Accepted Answer

A)    Kr 
B)    Sr 
C)    Br 
D)    Y 
E)    Kr 
A)    Kr 
B)    Sr 
C)    Br 
D)    Y 
E)    Kr

Question 5

Determine the binding energy of a F-19 nucleus. The F-19 nucleus has a mass of 18.99840325 u. A proton has a mass of 1.00728 u, a neutron has a mass of 1.008665 u, and 1 u is equivalent to 931 MeV of energy.

Accepted Answer

A)  142 MeV 
B)  796 MeV 
C)  1080 MeV 
D)  143 MeV 
E)  145 MeV 
A)  142 MeV 
B)  796 MeV 
C)  1080 MeV 
D)  143 MeV 
E)  145 MeV

Question 6

Write the nuclear equation for the alpha decay of   Ra.

Accepted Answer

A)    
B)    Ra →   n +   Ra 
C)    Ra →   e +   Ac 
D)    Ra +   e →   Ac 
E)    Ra →   He +   Rn 
A)    
B)    Ra →   n +   Ra 
C)    Ra →   e +   Ac 
D)    Ra +   e →   Ac 
E)    Ra →   He +   Rn

Question 7

Determine the identity of the daughter nuclide from the beta decay of   C.

Accepted Answer

A)    N 
B)    Be 
C)    N 
D)    C 
E)    B 
A)    N 
B)    Be 
C)    N 
D)    C 
E)    B

Question 8

Identify the nuclide that has the shortest half-life.

Accepted Answer

A)    U 
B)    C 
C)    Rn 
D)    Th 
E)    Th 
A)    U 
B)    C 
C)    Rn 
D)    Th 
E)    Th

Question 9

The radioactive decay of ________ is the single greatest source of human exposure to radiation.

Accepted Answer

A)  radon 
B)  uranium 
C)  ozone 
D)  carbon 
E)  thorium 
A)  radon 
B)  uranium 
C)  ozone 
D)  carbon 
E)  thorium

Question 10

Which radiation has the highest penetrating power?

Accepted Answer

A)  alpha rays 
B)  beta rays 
C)  gamma rays 
D)  positron emission 
E)  electron capture 
A)  alpha rays 
B)  beta rays 
C)  gamma rays 
D)  positron emission 
E)  electron capture

Question 11

Determine how many neutrons are produced during the spontaneous fission of   Am to form I-134 and Mo-107.

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Question 12

Which of the following nuclides are most likely to decay via positron emission?

Accepted Answer

A)  Cs-137 
B)  I-131 
C)  Al-24 
D)  K-42 
E)  N-14 
A)  Cs-137 
B)  I-131 
C)  Al-24 
D)  K-42 
E)  N-14

Question 13

Write a nuclear equation for the alpha decay of   U.

Accepted Answer

A)    U →   n +   U 
B)    U →   e +   Np 
C)    U →   He +   Th 
D)    U →   e +   Pa 
E)    U →   He +   Pu 
A)    U →   n +   U 
B)    U →   e +   Np 
C)    U →   He +   Th 
D)    U →   e +   Pa 
E)    U →   He +   Pu

Question 14

Above what atomic number are there no stable isotopes of any element?

Accepted Answer

A)  20 
B)  92 
C)  83 
D)  40 
E)  89 
A)  20 
B)  92 
C)  83 
D)  40 
E)  89

Question 15

Which of the following statements is TRUE?

Accepted Answer

A)  If the N/Z ratio is too high, there are too many neutrons and the nuclide will convert a neutron to a proton via beta decay. 
B)  If the N/Z ratio lies somewhere below 1, the nuclide is stable. 
C)  If the N/Z ratio is too low, there are too many neutrons and the nuclide will undergo beta decay. 
D)  The valley of stability is the geographic location where many of the known nuclides were first discovered. 
E)  All stable nuclei have an N/Z ratio equal to 1. 
A)  If the N/Z ratio is too high, there are too many neutrons and the nuclide will convert a neutron to a proton via beta decay. 
B)  If the N/Z ratio lies somewhere below 1, the nuclide is stable. 
C)  If the N/Z ratio is too low, there are too many neutrons and the nuclide will undergo beta decay. 
D)  The valley of stability is the geographic location where many of the known nuclides were first discovered. 
E)  All stable nuclei have an N/Z ratio equal to 1.

Question 16

Match the following.
-positron

Accepted Answer

A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e 
A)   e 
B)   p 
C)   He 
D)   g 
E)   n
F)  e

Question 17

Describe what changes occur in the atomic nucleus during alpha decay.

Accepted Answer

A)  The mass number and atomic number decrease. 
B)  The mass number and atomic number increase. 
C)  The mass number is unchanged and the atomic number decreases. 
D)  The mass number is unchanged and the atomic number increases. 
E)  The mass number and atomic number do not change. 
A)  The mass number and atomic number decrease. 
B)  The mass number and atomic number increase. 
C)  The mass number is unchanged and the atomic number decreases. 
D)  The mass number is unchanged and the atomic number increases. 
E)  The mass number and atomic number do not change.

Question 18

Identify the instrument used to detect radiation.

Accepted Answer

A)  cathode ray tube 
B)  Geiger counter 
C)  oscillation counter 
D)  X-ray tube 
E)  nuclear magnetic resonance instruments 
A)  cathode ray tube 
B)  Geiger counter 
C)  oscillation counter 
D)  X-ray tube 
E)  nuclear magnetic resonance instruments

Question 19

List two problems associated with nuclear power.

Accepted Answer

The fuel continues to generate heat afte

Question 20

The splitting of the uranium atom is called ________.

Accepted Answer

A)  radioactive cleavage 
B)  nuclear fission 
C)  nuclear fusion 
D)  radioactive merge 
E)  recombination 
A)  radioactive cleavage 
B)  nuclear fission 
C)  nuclear fusion 
D)  radioactive merge 
E)  recombination

Exam 19: Radioactivity and Nuclear Chemistry

Which nuclide below is most likely to decay by electron capture?

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second. After 2.00 y., the activity of the sample declines to 3115 disintegrations per second. The of is

Match the following. -electron

Determine the identity of the daughter nuclide from the electron capture by Rb.

Determine the binding energy of a F-19 nucleus. The F-19 nucleus has a mass of 18.99840325 u. A proton has a mass of 1.00728 u, a neutron has a mass of 1.008665 u, and 1 u is equivalent to 931 MeV of energy.

Write the nuclear equation for the alpha decay of Ra.

Determine the identity of the daughter nuclide from the beta decay of C.

Identify the nuclide that has the shortest half-life.

The radioactive decay of ________ is the single greatest source of human exposure to radiation.

Which radiation has the highest penetrating power?

Determine how many neutrons are produced during the spontaneous fission of Am to form I-134 and Mo-107.

Which of the following nuclides are most likely to decay via positron emission?

Write a nuclear equation for the alpha decay of U.

Above what atomic number are there no stable isotopes of any element?

Which of the following statements is TRUE?

Match the following. -positron

Describe what changes occur in the atomic nucleus during alpha decay.

Identify the instrument used to detect radiation.

List two problems associated with nuclear power.

The splitting of the uranium atom is called ________.

Units of Measurement for Physical and Chemical Change

Atoms and Elements

Molecules, Compounds, and Nomenclature

Chemical Reactions and Stoichiometry

Gases

Thermochemistry

The Quantum-Mechanical Model of the Atom

Periodic Properties of the Elements

Chemical Bonding I: Lewis Theory

Chemical Bonding Ii: Molecular Shapes, Valence Bond Theory, and Molecular Orbital Theory

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Gibbs Energy and Thermodynamics

Electrochemistry

Organic Chemistry I: Structures

Organic Chemistry Ii: Reactions

Biochemistry

Chemistry of the Nonmetals

Metals and Metallurgy

Transition Metals and Coordination Compounds

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