Question 1

Select the nuclide that completes the following nuclear reaction.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E) 
  B

Question 2

The radioisotope  
Will decay through

Accepted Answer

A) ($\alpha$ decay.) 
B) 9$\beta$ decay.) 
C) ($\gamma$ decay.) 
D) positron decay. 
E) electron capture. 
A) ($\alpha$ decay.) 
B) 9$\beta$ decay.) 
C) ($\gamma$ decay.) 
D) positron decay. 
E) electron capture. A

Question 3

Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons.Write a complete,balanced equation for this nuclear process.

Accepted Answer

The answer of Bombardment of uranium-238 nuclei by carbon-12 nuclei...

Question 4

Select the nuclide that completes the following nuclear reaction.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 5

Calcium-39 undergoes positron decay.Each positron carries 5.49 MeV of energy.How much energy will be emitted when 0.0025 mol of calcium-39 decays?

Accepted Answer

A) 13.2 kJ 
B) 1.32 $\times$ 104 kJ 
C) 1.32 $\times$ 106 kJ 
D) 1.32 $\times$ 109 kJ 
E) None of these choices is correct. 
A) 13.2 kJ 
B) 1.32 $\times$ 104 kJ 
C) 1.32 $\times$ 106 kJ 
D) 1.32 $\times$ 109 kJ 
E) None of these choices is correct.

Question 6

A 7.85 $\times$ 10-5 mol sample of copper-61 emits 1.47 $\times$ 1019 positrons in 90.0 minutes.What is the decay constant for copper-61?

Accepted Answer

A) 0.00230 h-1 
B) 0.00346 h-1 
C) 0.207 h-1 
D) 0.311 h-1 
E) None of these choices is correct. 
A) 0.00230 h-1 
B) 0.00346 h-1 
C) 0.207 h-1 
D) 0.311 h-1 
E) None of these choices is correct.

Question 7

Fill in missing sub- and superscripts for all particles to complete the following equation for alpha decay.

Accepted Answer

The answer of Fill in missing sub- and superscripts for...

Question 8

The radioisotope  
Will decay through

Accepted Answer

A) ($\alpha$ decay.) 
B) ($\beta$ decay.) 
C) positron decay. 
D) electron capture. 
E) ($\gamma$ decay.) 
A) ($\alpha$ decay.) 
B) ($\beta$ decay.) 
C) positron decay. 
D) electron capture. 
E) ($\gamma$ decay.)

Question 9

Identify the missing species in the following nuclear transmutation.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) None of these choices is correct. 
A) 
  
B) 
  
C) 
  
D) 
  
E) None of these choices is correct.

Question 10

Select the nuclide that completes the following nuclear reaction.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 11

The isotopes  
Are all stable,while  
Is radioactive.The mode of decay for  
Is most likely to be

Accepted Answer

A) positron decay. 
B) ($\alpha$ decay.) 
C) ($\gamma$ decay.) 
D) electron capture. 
E) ($\beta$ decay.) 
A) positron decay. 
B) ($\alpha$ decay.) 
C) ($\gamma$ decay.) 
D) electron capture. 
E) ($\beta$ decay.)

Question 12

Select the nuclide that completes the following nuclear reaction.

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 13

Which of the following isotopes is definitely unstable?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 14

The masses of a potassium-40 atom,a proton and a neutron are 39.963999 amu,1.007825 amu and 1.008665 amu,respectively.Calculate to four significant figures
a.the mass defect in amu and
b.the energy released in MeV/nucleon,in the formation of   
from the appropriate number of protons and neutrons.

Accepted Answer

a.0.3666 a

Question 15

The isotope  
Has a half-life of 21 hours.If a sample initially contains exactly 10000 atoms of  
,approximately how many of these atoms will remain after one week?

Accepted Answer

A) 1250 
B) 78 
C) 39 
D) 0 
E) None of these choices is correct. 
A) 1250 
B) 78 
C) 39 
D) 0 
E) None of these choices is correct.

Question 16

Which one of the following is an incorrect representation of the indicated particle or nucleus?

Accepted Answer

A) 
  
B) 
  
C) 
  
D) 
  
E) 
  
A) 
  
B) 
  
C) 
  
D) 
  
E)

Question 17

Identify the missing species in the following nuclear transmutation.

Accepted Answer

A) 2
  
B) 3
  
C) 
  
D) 
  
E) 
  
A) 2
  
B) 3
  
C) 
  
D) 
  
E)

Question 18

A 9.52 $\times$ 10-5 mol sample of rubidium-86 emits 8.87 $\times$ 1016 $\beta$ particles in one hour.What is the half-life of rubidium-86?

Accepted Answer

A) 2.23 $\times$ 10-3 h 
B) 1.55 $\times$ 10-3 h 
C) 448 h 
D) 645 h 
E) None of these choices is correct. 
A) 2.23 $\times$ 10-3 h 
B) 1.55 $\times$ 10-3 h 
C) 448 h 
D) 645 h 
E) None of these choices is correct.

Question 19

The isotope  
Is unstable.This is predictable because

Accepted Answer

A) the number of neutrons is too large in relation to the number of protons. 
B) the number of neutrons is too small in relation to the number of protons. 
C) the atomic number is too large. 
D) the mass number is too large. 
E) Sc isotopes are all unstable. 
A) the number of neutrons is too large in relation to the number of protons. 
B) the number of neutrons is too small in relation to the number of protons. 
C) the atomic number is too large. 
D) the mass number is too large. 
E) Sc isotopes are all unstable.

Question 20

Explain how the number of protons and neutrons in a radioactive nucleus can be used to predict its probable mode of decay.Illustrate your answer with a schematic graph,properly labeled,showing stable nuclides (nuclei)in relation to number of protons and neutrons.

Accepted Answer

The "line of stability" on the accompany

Exam 23: Nuclear Reactions and Their Applications

Select the nuclide that completes the following nuclear reaction.

The radioisotope Will decay through

Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons.Write a complete,balanced equation for this nuclear process.

Select the nuclide that completes the following nuclear reaction.

Calcium-39 undergoes positron decay.Each positron carries 5.49 MeV of energy.How much energy will be emitted when 0.0025 mol of calcium-39 decays?

A 7.85 ×\times× 10-5 mol sample of copper-61 emits 1.47 ×\times× 1019 positrons in 90.0 minutes.What is the decay constant for copper-61?

Fill in missing sub- and superscripts for all particles to complete the following equation for alpha decay.

The radioisotope Will decay through

Identify the missing species in the following nuclear transmutation.

Select the nuclide that completes the following nuclear reaction.

The isotopes Are all stable,while Is radioactive.The mode of decay for Is most likely to be

Select the nuclide that completes the following nuclear reaction.

Which of the following isotopes is definitely unstable?

The masses of a potassium-40 atom,a proton and a neutron are 39.963999 amu,1.007825 amu and 1.008665 amu,respectively.Calculate to four significant figures a.the mass defect in amu and b.the energy released in MeV/nucleon,in the formation of from the appropriate number of protons and neutrons.

The isotope Has a half-life of 21 hours.If a sample initially contains exactly 10000 atoms of ,approximately how many of these atoms will remain after one week?

Which one of the following is an incorrect representation of the indicated particle or nucleus?

Identify the missing species in the following nuclear transmutation.

A 9.52 ×\times× 10-5 mol sample of rubidium-86 emits 8.87 ×\times× 1016 β\betaβ particles in one hour.What is the half-life of rubidium-86?

The isotope Is unstable.This is predictable because

Explain how the number of protons and neutrons in a radioactive nucleus can be used to predict its probable mode of decay.Illustrate your answer with a schematic graph,properly labeled,showing stable nuclides (nuclei)in relation to number of protons and neutrons.

Keys to the Study of Chemistry

The Components of Matter

Stoichiometry of Formulas and Equations

Three Major Classes of Chemical Reactions

Gases and the Kinetic-Molecular Theory

Thermochemistry: Energy Flow and Chemical Change

Quantum Theory and Atomic Structure

Electron Configuration and Chemical Periodicity

Models of Chemical Bonding

The Shapes of Molecules

Theories of Covalent Bonding

Intermolecular Forces: Liquids,solids,and Phase Changes

The Properties of Solutions

The Main-Group Elements: Applying Principles of Bonding and Structure

Organic Compounds and the Atomic Properties of Carbon

Kinetics: Rates and Mechanisms of Chemical Reactions

Equilibrium: the Extent of Chemical Reactions

Acid-Base Equilibria

Ionic Equilibria in Aqueous Systems

Thermodynamics: Entropy, free Energy, and the Direction of Chemical Reactions

Electrochemistry: Chemical Change and Electrical Work

The Transition Elements and Their Coordination Compounds

Filters

A 7.85 $\times$ 10^-5 mol sample of copper-61 emits 1.47 $\times$ 10¹⁹ positrons in 90.0 minutes.What is the decay constant for copper-61?

A 9.52 $\times$ 10^-5 mol sample of rubidium-86 emits 8.87 $\times$ 10¹⁶ $\beta$ particles in one hour.What is the half-life of rubidium-86?