Question 1

Protactinium-234 has a half-life of 1 minute. How much of a 400. g sample protactinium would remain after 2 minutes

Accepted Answer

A)  140. g 
B)  120. g 
C)  100. g 
D)  80.0 g 
E)  None of the above 
A)  140. g 
B)  120. g 
C)  100. g 
D)  80.0 g 
E)  None of the above C

Question 2

List the given types of nuclear radiation (cosmic rays, medical and dental X rays, and nuclear waste) in order of how much each contributes to the average yearly dose of nuclear radiation for Americans

Accepted Answer

A)  cosmic rays < medical and dental X rays < nuclear waste 
B)  medical and dental X rays < cosmic rays < nuclear waste 
C)  nuclear waste < cosmic rays < medical and dental X rays 
D)  cosmic rays < nuclear waste < medical and dental X rays 
E)  medical and dental X rays < nuclear waste < cosmic rays 
A)  cosmic rays < medical and dental X rays < nuclear waste 
B)  medical and dental X rays < cosmic rays < nuclear waste 
C)  nuclear waste < cosmic rays < medical and dental X rays 
D)  cosmic rays < nuclear waste < medical and dental X rays 
E)  medical and dental X rays < nuclear waste < cosmic rays C

Question 3

Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons

Accepted Answer

A)  nobelium-245 
B)  radium-259 
C)  californium-245 
D)  nobelium-249 
E)  californium-249 
A)  nobelium-245 
B)  radium-259 
C)  californium-245 
D)  nobelium-249 
E)  californium-249 E

Question 4

When a 87Br nucleus emits a beta particle, the nuclear species that results is ___________.

Accepted Answer

A)  bromine-87 
B)  krypton-87 
C)  selenium-87 
D)  arsenic-86 
E)  None of the above 
A)  bromine-87 
B)  krypton-87 
C)  selenium-87 
D)  arsenic-86 
E)  None of the above

Question 5

In the following reaction, identify X . ${ }_{98}^{252} \mathrm{Cf}\left({ }^{10} \mathrm{~B}, 5 \mathrm{n}\right) \mathrm{X}$

Accepted Answer

A)  ${ }_{103}^{257} \mathrm{Lr}$ 
B)  ${ }_{98}^{247} \mathrm{~Np}$ 
C)  ${ }_{98}^{247} \mathrm{Cf}$ 
D)  ${ }_{103}^{262} \mathrm{Lr}$ 
E)  ${ }_{93}^{257} \mathrm{~Np}$ 
A)  ${ }_{103}^{257} \mathrm{Lr}$ 
B)  ${ }_{98}^{247} \mathrm{~Np}$ 
C)  ${ }_{98}^{247} \mathrm{Cf}$ 
D)  ${ }_{103}^{262} \mathrm{Lr}$ 
E)  ${ }_{93}^{257} \mathrm{~Np}$

Question 6

Calculate the binding energy per nucleon of an Al-27 nucleus given the following masses: ${ }_{13}^{27} \mathrm{Al}$ : 26.981541 amu; : ${ }_{1}^{1} \mathrm{H}$ 1.007838 amu; : ${ }_{0}^{1} \mathrm{n}$ 1.008665 amu.

Accepted Answer

A)  1.14 * 10-12 J/nucleon 
B)  1.34 * 10-12 J/nucleon 
C)  1.54 * 10-12 J/nucleon 
D)  1.74 * 10-12 J/nucleon 
E)  None of the above 
A)  1.14 * 10-12 J/nucleon 
B)  1.34 * 10-12 J/nucleon 
C)  1.54 * 10-12 J/nucleon 
D)  1.74 * 10-12 J/nucleon 
E)  None of the above

Question 7

Consider the following decay series:   What type of nuclear process occurs at the transformation labeled I

Accepted Answer

A)  aemission 
B)  bemission 
C)  positron emission 
D)  electron capture 
E)  gamma radiation 
A)  aemission 
B)  bemission 
C)  positron emission 
D)  electron capture 
E)  gamma radiation

Question 8

The energy released by the sun is the result of

Accepted Answer

A)  natural radioactivity. 
B)  nuclear fusion. 
C)  combustion of hydrogen. 
D)  photosynthesis. 
E)  nuclear fission. 
A)  natural radioactivity. 
B)  nuclear fusion. 
C)  combustion of hydrogen. 
D)  photosynthesis. 
E)  nuclear fission.

Question 9

Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.60 that of new wood. How old is the charcoal (The half-life of carbon-14 is 5,730 years.)

Accepted Answer

A)  Less than 5,730 yr 
B)  Between 5,730 and 11,460 yr 
C)  Between 11,460 and 17,190 yr 
D)  More than 17,190 yr 
A)  Less than 5,730 yr 
B)  Between 5,730 and 11,460 yr 
C)  Between 11,460 and 17,190 yr 
D)  More than 17,190 yr

Question 10

The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175 years later

Accepted Answer

A)  0.17 
B)  0.12 
C)  0.062 
D)  0.015 
E)  0.50 
A)  0.17 
B)  0.12 
C)  0.062 
D)  0.015 
E)  0.50

Question 11

Cobalt-58 is less stable than cobalt-59.

Accepted Answer

A) True 
 B)False

Question 12

When tThorium-225 undergoes alpha decay the new atom produced would be thorium-221

Accepted Answer

A) True 
 B)False

Question 13

Which of the following is an example of a free radical

Accepted Answer

A)  H3O+ 
B)  H2O2 
C)  HO2- 
D)  HO2· 
E)  H2O 
A)  H3O+ 
B)  H2O2 
C)  HO2- 
D)  HO2· 
E)  H2O

Question 14

How old is a bottle of wine if the tritium (3H) content is 25% that of a new wine? The half-life of tritium is 12.5 years.

Accepted Answer

A)  0.25 yr 
B)  3.1 yr 
C)  25 yr 
D)  38 yr 
E)  50. yr 
A)  0.25 yr 
B)  3.1 yr 
C)  25 yr 
D)  38 yr 
E)  50. yr

Question 15

Consider the following decay series:   What is the symbol for the product labeled as Y

Accepted Answer

A)  ${ }_{84}^{126} \mathrm{Po}$ 
B)  ${ }_{83}^{127} \mathrm{Bi}$ 
C)  ${ }_{82}^{124} \mathrm{~Pb}$ 
D)  ${ }_{84}^{210} \mathrm{Po}$ 
E)  ${ }_{82}^{206} \mathrm{~Pb}$ 
A)  ${ }_{84}^{126} \mathrm{Po}$ 
B)  ${ }_{83}^{127} \mathrm{Bi}$ 
C)  ${ }_{82}^{124} \mathrm{~Pb}$ 
D)  ${ }_{84}^{210} \mathrm{Po}$ 
E)  ${ }_{82}^{206} \mathrm{~Pb}$

Question 16

Which of the following represents a rule for balancing a nuclear equation
I. The total number of protons plus neutrons in the products and reactants must be the same
II. The total number of each type of element in the products and reactants must be the same
III. The total number of nuclear charges in the products and reactants must be the same
IV. The total number of each type of elementary particle in the products and reactants must be the same

Accepted Answer

A)  I, II, III, and IV 
B)  I, II, and IV 
C)  I, III, and IV 
D)  III and IV 
E)  I and III 
A)  I, II, III, and IV 
B)  I, II, and IV 
C)  I, III, and IV 
D)  III and IV 
E)  I and III

Question 17

Determine how much energy is released when polonium-210 decays according to ${ }^{210} \mathrm{Po} \rightarrow{ }^{4} \mathrm{He}+{ }^{206} \mathrm{~Pb}$ . [Atomic masses: polonium-210 = 209.982857 amu; helium-4 = 4.002603 amu; lead-206 = 205.974449 amu]

Accepted Answer

A)  4.14 * 109 kJ/mol 
B)  7.20 * 1011 kJ/mol 
C)  5.22 * 108 kJ/mol 
D)  4.66 * 109 kJ/mol 
E)  6.43 * 1012 kJ/mol 
A)  4.14 * 109 kJ/mol 
B)  7.20 * 1011 kJ/mol 
C)  5.22 * 108 kJ/mol 
D)  4.66 * 109 kJ/mol 
E)  6.43 * 1012 kJ/mol

Question 18

Complete and balance the nuclear equation ${ }_{7}^{13} \mathrm{~N} \rightarrow{ }_{6}^{13} \mathrm{C}+$ __________.

Accepted Answer

A)  ${ }_{0}^{+1} e$ 
B)  ${ }^{-1}_0 e$ 
C)  ${ }_{+1}^{0} e$ 
D)  ${ }_{-1}^{0} e$ 
E)  None of the above 
A)  ${ }_{0}^{+1} e$ 
B)  ${ }^{-1}_0 e$ 
C)  ${ }_{+1}^{0} e$ 
D)  ${ }_{-1}^{0} e$ 
E)  None of the above

Question 19

Which of the following is characteristic of a nuclear reaction
I. Electrons in atomic orbitals are involved in the breaking and forming of bonds
II. Elements are converted from one to another
III. Reaction rates are typically not affected by catalysts
IV. Atoms are rearranged by the breaking and forming of chemical bonds

Accepted Answer

A)  I and II 
B)  I, II, and III 
C)  III and IV 
D)  II and III 
E)  I, II, III, and IV 
A)  I and II 
B)  I, II, and III 
C)  III and IV 
D)  II and III 
E)  I, II, III, and IV

Question 20

List the number of protons, neutrons, and nucleons (protons + neutrons), in that order, for an isotope with the symbol: $^{137}_{~~55}$Cs

Accepted Answer

A)  137, 55, 192 
B)  55, 137, 192 
C)  55, 82, 137 
D)  82, 55, 137 
E)  82, 137, 219 
A)  137, 55, 192 
B)  55, 137, 192 
C)  55, 82, 137 
D)  82, 55, 137 
E)  82, 137, 219

Exam 19: Nuclear Chemistry

Protactinium-234 has a half-life of 1 minute. How much of a 400. g sample protactinium would remain after 2 minutes

List the given types of nuclear radiation (cosmic rays, medical and dental X rays, and nuclear waste) in order of how much each contributes to the average yearly dose of nuclear radiation for Americans

Which isotope, when bombarded with oxygen-18, yields the artificial isotope seaborgium-263 plus 4 neutrons

When a 87Br nucleus emits a beta particle, the nuclear species that results is ___________.

In the following reaction, identify X . 98252Cf(10 B,5n)X{ }_{98}^{252} \mathrm{Cf}\left({ }^{10} \mathrm{~B}, 5 \mathrm{n}\right) \mathrm{X}98252​Cf(10 B,5n)X

Calculate the binding energy per nucleon of an Al-27 nucleus given the following masses: 1327Al{ }_{13}^{27} \mathrm{Al}1327​Al : 26.981541 amu; : 11H{ }_{1}^{1} \mathrm{H}11​H 1.007838 amu; : 01n{ }_{0}^{1} \mathrm{n}01​n 1.008665 amu.

Consider the following decay series: What type of nuclear process occurs at the transformation labeled I

The energy released by the sun is the result of

Charcoal found under a stone at Stonehenge, England, has a carbon-14 activity that is 0.60 that of new wood. How old is the charcoal (The half-life of carbon-14 is 5,730 years.)

The half-life of 90Sr is 29 years. What fraction of the atoms in a sample of 90Sr would remain 175 years later

Cobalt-58 is less stable than cobalt-59.

When tThorium-225 undergoes alpha decay the new atom produced would be thorium-221

Which of the following is an example of a free radical

How old is a bottle of wine if the tritium (3H) content is 25% that of a new wine? The half-life of tritium is 12.5 years.

Consider the following decay series: What is the symbol for the product labeled as Y

Determine how much energy is released when polonium-210 decays according to 210Po→4He+206 Pb{ }^{210} \mathrm{Po} \rightarrow{ }^{4} \mathrm{He}+{ }^{206} \mathrm{~Pb}210Po→4He+206 Pb . [Atomic masses: polonium-210 = 209.982857 amu; helium-4 = 4.002603 amu; lead-206 = 205.974449 amu]

Complete and balance the nuclear equation 713 N→613C+{ }_{7}^{13} \mathrm{~N} \rightarrow{ }_{6}^{13} \mathrm{C}+713​ N→613​C+ __________.

List the number of protons, neutrons, and nucleons (protons + neutrons), in that order, for an isotope with the symbol: 55137^{137}_{~~55} 55137​ Cs

Chemistry: The Study of Change

Atoms Molecules and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Chemical Bonding II: Molecular Geometry and Hybridization of Atomic

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Entropy Free Energy and Equilibrium

Electrochemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metals Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

When a ⁸⁷Br nucleus emits a beta particle, the nuclear species that results is ___________.

In the following reaction, identify X . ${ }_{98}^{252} \mathrm{Cf}\left({ }^{10} \mathrm{~B}, 5 \mathrm{n}\right) \mathrm{X}$

Calculate the binding energy per nucleon of an Al-27 nucleus given the following masses: ${ }_{13}^{27} \mathrm{Al}$ : 26.981541 amu; : ${ }_{1}^{1} \mathrm{H}$ 1.007838 amu; : ${ }_{0}^{1} \mathrm{n}$ 1.008665 amu.

The half-life of ⁹⁰Sr is 29 years. What fraction of the atoms in a sample of ⁹⁰Sr would remain 175 years later

How old is a bottle of wine if the tritium (³H) content is 25% that of a new wine? The half-life of tritium is 12.5 years.

Determine how much energy is released when polonium-210 decays according to ${ }^{210} \mathrm{Po} \rightarrow{ }^{4} \mathrm{He}+{ }^{206} \mathrm{~Pb}$ . [Atomic masses: polonium-210 = 209.982857 amu; helium-4 = 4.002603 amu; lead-206 = 205.974449 amu]

Complete and balance the nuclear equation ${ }_{7}^{13} \mathrm{~N} \rightarrow{ }_{6}^{13} \mathrm{C}+$ __________.

List the number of protons, neutrons, and nucleons (protons + neutrons), in that order, for an isotope with the symbol: $^{137}_{~~55}$ Cs