Question 1

A sample initially contains 3.2 moles of a radioactive isotope.How much of the sample remains after four half-lives?

Accepted Answer

A) 0.20 mol 
B) 1.6 mol 
C) 0.80 mol 
D) 0.40 mol 
A) 0.20 mol 
B) 1.6 mol 
C) 0.80 mol 
D) 0.40 mol

Question 2

Determine the identity of the daughter nuclide from the alpha decay of  Rn.

Accepted Answer

A)   Po 
B)   Ra 
C)   Th 
D)   Rn 
E)   At 
A)   Po 
B)   Ra 
C)   Th 
D)   Rn 
E)   At

Question 3

The following reaction represents what nuclear process? 
 Cs + E →  Xe

Accepted Answer

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

Question 4

Which of the following statements are true?

Accepted Answer

A) Gamma rays have the lowest ionizing power of any radioactivity. 
B) Alpha radiation has the highest penetrating power of any radioactivity. 
C) Beta emitters will do more damage than alpha emitters within the body. 
D) Beta radiation has the highest ionizing power of any radioactivity. 
E) None of the above are true. 
A) Gamma rays have the lowest ionizing power of any radioactivity. 
B) Alpha radiation has the highest penetrating power of any radioactivity. 
C) Beta emitters will do more damage than alpha emitters within the body. 
D) Beta radiation has the highest ionizing power of any radioactivity. 
E) None of the above are true.

Question 5

Describe an alpha particle.

Accepted Answer

A) electromagnetic radiation 
B) two neutrons and two protons 
C) an electron 
D) two neutrons and two electrons 
E) a proton 
A) electromagnetic radiation 
B) two neutrons and two protons 
C) an electron 
D) two neutrons and two electrons 
E) a proton

Question 6

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

Accepted Answer

A)   Co 
B)   Mn 
C)   Co 
D)   Mn 
E)   Cr 
A)   Co 
B)   Mn 
C)   Co 
D)   Mn 
E)   Cr

Question 7

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

Accepted Answer

A) Na-26 
B) I-121 
C) Ca-42 
D) S-30 
E) Sb-122 
A) Na-26 
B) I-121 
C) Ca-42 
D) S-30 
E) Sb-122

Question 8

Determine the identity of the daughter nuclide from the alpha decay of  Ra.

Accepted Answer

A)   Fr 
B)   Ac 
C)   Po 
D)   Th 
E)   Rn 
A)   Fr 
B)   Ac 
C)   Po 
D)   Th 
E)   Rn

Question 9

Write a nuclear equation to describe the neutron induced fission of   Pu to form
  Kr and   Ce.Determine how many neutrons are produced in the reaction.

Accepted Answer

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

Question 10

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second.After 6.00 yr,the activity of the sample declines to 2755 disintegrations per second.The half-life of curium-243 is ________ yr.

Accepted Answer

A) 4.99 
B) 32.6 
C) 7.21 
D) 0.765 
E) 22.6 
A) 4.99 
B) 32.6 
C) 7.21 
D) 0.765 
E) 22.6

Question 11

Describe what changes occur during electron capture.

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 12

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

Accepted Answer

A)   C 
B)   He 
C)   B 
D)   Li 
E)   B 
A)   C 
B)   He 
C)   B 
D)   Li 
E)   B

Question 13

Describe what changes occur during positron emission.

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 14

Determine the identity of the daughter nuclide from the positron emission of  O.

Accepted Answer

A)   C 
B)   F 
C)   N 
D)   N 
E)   C 
A)   C 
B)   F 
C)   N 
D)   N 
E)   C

Question 15

Determine the identity of the daughter nuclide from the alpha decay of  Th.

Accepted Answer

A)   U 
B)   Pa 
C)   Ra 
D)   Ac 
E)   Th 
A)   U 
B)   Pa 
C)   Ra 
D)   Ac 
E)   Th

Question 16

Which of the following nuclides is most likely to undergo beta decay?

Accepted Answer

A)   Pt 
B)   Pt 
C)   Pt 
D)   Pt 
A)   Pt 
B)   Pt 
C)   Pt 
D)   Pt

Question 17

Stable isotopes,with low atomic numbers,have a N/Z ratio of 1.What does that imply?

Accepted Answer

A) The number of neutrons equals the number of protons. 
B) The number of neutrons equals the number of electrons plus protons. 
C) The number of electrons equals the number of neutrons plus protons. 
D) The atomic number equals the atomic mass. 
E) The number of protons equals the number of electrons plus neutrons. 
A) The number of neutrons equals the number of protons. 
B) The number of neutrons equals the number of electrons plus protons. 
C) The number of electrons equals the number of neutrons plus protons. 
D) The atomic number equals the atomic mass. 
E) The number of protons equals the number of electrons plus neutrons.

Question 18

The graph below shows the mass of a decaying nuclide versus time.  
What is the half-life of the decay?

Accepted Answer

A) 35 min 
B) 25 min 
C) 15 min 
D) 70 min 
A) 35 min 
B) 25 min 
C) 15 min 
D) 70 min

Question 19

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

Accepted Answer

A) I-126 
B) Al-24 
C) N-13 
D) Cs-137 
E) Na-20 
A) I-126 
B) Al-24 
C) N-13 
D) Cs-137 
E) Na-20

Question 20

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

A sample initially contains 3.2 moles of a radioactive isotope.How much of the sample remains after four half-lives?

Determine the identity of the daughter nuclide from the alpha decay of Rn.

The following reaction represents what nuclear process? Cs +E → Xe

Which of the following statements are true?

Describe an alpha particle.

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

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

Determine the identity of the daughter nuclide from the alpha decay of Ra.

Write a nuclear equation to describe the neutron induced fission of Pu to form Kr and Ce.Determine how many neutrons are produced in the reaction.

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second.After 6.00 yr,the activity of the sample declines to 2755 disintegrations per second.The half-life of curium-243 is ________ yr.

Describe what changes occur during electron capture.

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

Describe what changes occur during positron emission.

Determine the identity of the daughter nuclide from the positron emission of O.

Determine the identity of the daughter nuclide from the alpha decay of Th.

Which of the following nuclides is most likely to undergo beta decay?

Stable isotopes,with low atomic numbers,have a N/Z ratio of 1.What does that imply?

The graph below shows the mass of a decaying nuclide versus time. What is the half-life of the decay?

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

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

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Exam 19: Radioactivity and Nuclear Chemistry

A sample initially contains 3.2 moles of a radioactive isotope.How much of the sample remains after four half-lives?

Determine the identity of the daughter nuclide from the alpha decay of Rn.

The following reaction represents what nuclear process? Cs +E → Xe

Which of the following statements are true?

Describe an alpha particle.

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

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

Determine the identity of the daughter nuclide from the alpha decay of Ra.

Write a nuclear equation to describe the neutron induced fission of Pu to form Kr and Ce.Determine how many neutrons are produced in the reaction.

A freshly prepared sample of curium-243 undergoes 3312 disintegrations per second.After 6.00 yr,the activity of the sample declines to 2755 disintegrations per second.The half-life of curium-243 is ________ yr.

Describe what changes occur during electron capture.

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

Describe what changes occur during positron emission.

Determine the identity of the daughter nuclide from the positron emission of O.

Determine the identity of the daughter nuclide from the alpha decay of Th.

Which of the following nuclides is most likely to undergo beta decay?

Stable isotopes,with low atomic numbers,have a N/Z ratio of 1.What does that imply?

The graph below shows the mass of a decaying nuclide versus time. What is the half-life of the decay?

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

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

Matter, Measurement, and Problem Solving

Atoms and Elements

Molecules, Compounds and Chemical Equations

Chemical Quantities and Aqueous Reactions

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

Liquids, Solids, and Intermolecular Forces

Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Aqueous Ionic Equilibrium

Free Energy and Thermodynamics

Electrochemistry

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