Question 1

-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

Accepted Answer

A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission 
A) α emission 
B) β emission 
C) γ emission 
D) electron capture or positron emission

Question 2

Which of the following is not an advantage of fusion reactions over fission reactions for power generation?

Accepted Answer

A) cheap and plentiful fuel 
B) ease of reaction initiation 
C) Fusion products are non-polluting. 
D) Fusion products are nonradioactive. 
A) cheap and plentiful fuel 
B) ease of reaction initiation 
C) Fusion products are non-polluting. 
D) Fusion products are nonradioactive.

Question 3

The mass defect for the formation of lithium-6 is 0.0343 g/mol.The binding energy for lithium-6 nuclei is ________ kJ/mol.

Accepted Answer

The answer of The mass defect for the formation of...

Question 4

What is needed to balance the nuclear fission reaction below?   n +   U →   Te + ? + 2   n

Accepted Answer

The answer of What is needed to balance the nuclear...

Question 5

The masses of 4He,6Li,and 10B are 4.0015,6.0135,and 10.0102 amu respectively.The fission of a boron-10 nucleus into He-4 and Li-6 would

Accepted Answer

A) absorb energy. 
B) evolve energy. 
C) result in no energy change. 
D) Need more information 
A) absorb energy. 
B) evolve energy. 
C) result in no energy change. 
D) Need more information

Question 6

Carbon-14,which is present in all living tissue,radioactively decays via a first-order process.A one-gram sample of wood taken from a living tree gives a rate for carbon-14 decay of 13.6 counts per minute.If the half-life for carbon-14 is 5715 years,how old is a wood sample that gives a rate for carbon-14 decay of 7.9 counts per minute?

Accepted Answer

A) 2.2 × 103 yr 
B) 3.1 × 103 yr 
C) 4.5 × 103 yr 
D) 1.4 × 104 yr 
A) 2.2 × 103 yr 
B) 3.1 × 103 yr 
C) 4.5 × 103 yr 
D) 1.4 × 104 yr

Question 7

Which of the following nuclides is most likely to decay by electron capture?

Accepted Answer

A)   
Hg 
B)   
Hg 
C)   
Hg 
D)   
Hg 
A)   
Hg 
B)   
Hg 
C)   
Hg 
D)   
Hg

Question 8

A radioisotope which is neutron poor and very heavy is most likely to decay by

Accepted Answer

A) alpha emission,electron capture,or positron emission. 
B) only alpha emission. 
C) only electron capture. 
D) only positron emission. 
A) alpha emission,electron capture,or positron emission. 
B) only alpha emission. 
C) only electron capture. 
D) only positron emission.

Question 9

The nuclear transformation potassium-40 argon-40 + ? is classified as

Accepted Answer

A) alpha emission. 
B) beta emission. 
C) electron capture. 
D) positron emission. 
A) alpha emission. 
B) beta emission. 
C) electron capture. 
D) positron emission.

Question 10

Which reaction is expected to release the greatest amount of energy?

Accepted Answer

A) 2 H → H2 
B)   
H +
  
H →
  
He 
C)   
N +
  
U →
  
Te +
  
Zr + 2 1n 
D)   
N +
  
U →
  
Ba +
  
Kr + 3
  
N 
A) 2 H → H2 
B)   
H +
  
H →
  
He 
C)   
N +
  
U →
  
Te +
  
Zr + 2 1n 
D)   
N +
  
U →
  
Ba +
  
Kr + 3
  
N

Question 11

When   Rn decays in a 5-step series the product is   Pb.How many alpha and beta particles are emitted in the decay series?

Accepted Answer

A) 1 α,3 β- 
B) 3 α,2 β- 
C) 1 α,1 β- 
D) 3 α,4 β- 
A) 1 α,3 β- 
B) 3 α,2 β- 
C) 1 α,1 β- 
D) 3 α,4 β-

Question 12

A sievert is

Accepted Answer

A) the amount of sample that undergoes 1 disintegration per second. 
B) the amount of sample that undergoes 3.7 × 1010 disintegrations per second. 
C) the amount of tissue damage done by radiation. 
D) equal to 0.01 J of energy absorbed per kilogram of tissue. 
A) the amount of sample that undergoes 1 disintegration per second. 
B) the amount of sample that undergoes 3.7 × 1010 disintegrations per second. 
C) the amount of tissue damage done by radiation. 
D) equal to 0.01 J of energy absorbed per kilogram of tissue.

Question 13

Which unit of radiation describes the amount of radiation emitted by a radioactive substance?

Accepted Answer

A) becquerel 
B) gray 
C) rad 
D) rem 
A) becquerel 
B) gray 
C) rad 
D) rem

Question 14

Elements with ________ atomic mass are best possible candidates for a fission reaction.

Accepted Answer

A) very low 
B) moderate 
C) moderate to heavy 
D) very heavy 
A) very low 
B) moderate 
C) moderate to heavy 
D) very heavy

Question 15

A curie is

Accepted Answer

A) the amount of sample that undergoes 1 disintegration per second. 
B) the amount of sample that undergoes 3.7 × 1010 disintegrations per second. 
C) the amount of tissue damage done by radiation. 
D) equal to 0.01 J of energy absorbed per kilogram of tissue. 
A) the amount of sample that undergoes 1 disintegration per second. 
B) the amount of sample that undergoes 3.7 × 1010 disintegrations per second. 
C) the amount of tissue damage done by radiation. 
D) equal to 0.01 J of energy absorbed per kilogram of tissue.

Question 16

A positron is

Accepted Answer

A)   
N. 
B)   
P. 
C)   
E. 
D)   
E. 
A)   
N. 
B)   
P. 
C)   
E. 
D)   
E.

Question 17

Cm decays by alpha emission to give   Pu.If unshaded spheres represent   Cm atoms and shaded spheres represent   Pu atoms,how many half-lives have passed in the following example?

Accepted Answer

A) 1 half-life 
B) 2 half-lives 
C) 3 half-lives 
D) 4 half-lives 
A) 1 half-life 
B) 2 half-lives 
C) 3 half-lives 
D) 4 half-lives

Question 18

When a substance decays by alpha radiation,the mass number of the nucleus ________ and the atomic number ________.

Accepted Answer

A) increases by 4,increases by 2 
B) reduces by 4,reduces by 2 
C) increases by 1,increases by 4 
D) reduces by 3,reduces by 1 
A) increases by 4,increases by 2 
B) reduces by 4,reduces by 2 
C) increases by 1,increases by 4 
D) reduces by 3,reduces by 1

Question 19

Choose the words that best complete the following sentence. The ________ the binding energy,the ________ stable the nucleus.

Accepted Answer

A) larger,less 
B) larger,more 
C) smaller,less 
D) smaller,more 
A) larger,less 
B) larger,more 
C) smaller,less 
D) smaller,more

Question 20

The rate of a nuclear reaction can be changed by

Accepted Answer

A) adding a catalyst. 
B) increasing the volume. 
C) increasing the temperature. 
D) None of these 
A) adding a catalyst. 
B) increasing the volume. 
C) increasing the temperature. 
D) None of these

Exam 19: Nuclear Chemistry

-What kind of decay process is occurring in the decay of isotope C to isotope D in the figure shown above?

Which of the following is not an advantage of fusion reactions over fission reactions for power generation?

The mass defect for the formation of lithium-6 is 0.0343 g/mol.The binding energy for lithium-6 nuclei is ________ kJ/mol.

What is needed to balance the nuclear fission reaction below? n + U → Te + ? + 2 n

The masses of 4He,6Li,and 10B are 4.0015,6.0135,and 10.0102 amu respectively.The fission of a boron-10 nucleus into He-4 and Li-6 would

Which of the following nuclides is most likely to decay by electron capture?

A radioisotope which is neutron poor and very heavy is most likely to decay by

The nuclear transformation potassium-40 argon-40 + ? is classified as

Which reaction is expected to release the greatest amount of energy?

When Rn decays in a 5-step series the product is Pb.How many alpha and beta particles are emitted in the decay series?

A sievert is

Which unit of radiation describes the amount of radiation emitted by a radioactive substance?

Elements with ________ atomic mass are best possible candidates for a fission reaction.

A curie is

A positron is

Cm decays by alpha emission to give Pu.If unshaded spheres represent Cm atoms and shaded spheres represent Pu atoms,how many half-lives have passed in the following example?

When a substance decays by alpha radiation,the mass number of the nucleus ________ and the atomic number ________.

Choose the words that best complete the following sentence. The ________ the binding energy,the ________ stable the nucleus.

The rate of a nuclear reaction can be changed by

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Covalent Compounds: Bonding Theories and Molecular Structure

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

The masses of ⁴He,⁶Li,and ¹⁰B are 4.0015,6.0135,and 10.0102 amu respectively.The fission of a boron-10 nucleus into He-4 and Li-6 would

When a substance decays by alpha radiation,the mass number of the nucleus and the atomic number .

Choose the words that best complete the following sentence. The the binding energy,the stable the nucleus.