Question 1

What is the specific activity (in Ci/g) of an isotope if 3.56 mg emits 4.26  ×	imes×  108  β\betaβ  particles per second?

Accepted Answer

A)  0.003232 Ci/g
B)  0.0115 Ci/g
C)  0.309 Ci/g
D)  3.23 Ci/g
E)  None of these choices is correct. F) A) and B)
G) D) and E)

Question 2

An isotope with Z > 83,which lies close to the band of stability,will generally decay through

Accepted Answer

A)  ( α\alphaα  decay.) 
B)  ( β\betaβ  decay.) 
C)  ( γ\gammaγ  decay.) 
D)  positron decay.
E)  electron capture. F) C) and E)
G) B) and E)

Question 3

It is believed that two carbon-12 nuclei can react in the core of a supergiant star to form sodium-23 and hydrogen-1.Calculate the energy released from this reaction for each mole of hydrogen formed.The masses of carbon-12,sodium-23,and hydrogen-1 are 12.0000 amu,22.989767 amu,and 1.007825,respectively. 14 kJ B) 2.16  	imes  1011 kJ C) 2.16  	imes  108 kJ D) 2.16  	imes  105 kJ E) None of these choices is correct. " class="answers-bank-image d-inline" rel="preload" >

Accepted Answer

A)  2.16  ×	imes×  1014 kJ
B)  2.16  ×	imes×  1011 kJ
C)  2.16  ×	imes×  108 kJ
D)  2.16  ×	imes×  105 kJ
E)  None of these choices is correct. F) C) and D)
G) A) and E)

Question 4

Positron decay and electron capture have the same net effect on the Z and N values of a nucleus.

Accepted Answer

A) True 
 B)False

Question 5

Most foodstuffs contain natural,radioactive isotopes.

Accepted Answer

A) True 
 B)False

Question 6

The isotopes of promethium, 
And 
,are unstable,and lie on opposite sides of the "line of stability".Which of the following combinations is most likely to represent the type of decay for these isotopes?

Accepted Answer

A)  promethium-144, β\betaβ decay;promethium-134,positron decay
B)  promethium-144,positron decay;promethium-134, β\betaβ  decay
C)  promethium-144,positron decay;promethium-134,electron capture
D)  promethium-144,electron capture;promethium-134,positron decay
E)  promethium-144, β\betaβ decay;promethium-134, γ\gammaγ  decay F) B) and E)
G) C) and D)

Question 7

Which one of the following equations correctly represents positron decay of 
?

Accepted Answer

A)  
B)  
C)  
D)  
E)  F) C) and D)
G) B) and D)

Question 8

Write a complete,balanced equation to represent the beta decay of thallium-207.

Accepted Answer

The answer of Write a complete,balanced equation to represent the...

Question 9

Cesium-134 is a  β\betaβ  emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

Accepted Answer

A)  0.0024 g
B)  0.078 g
C)  0.25 g
D)  0.50 g
E)  None of these choices is correct. F) B) and D)
G) None of the above

Question 10

Identify the missing species in the following nuclear transmutation.

Accepted Answer

A)  
B)  
C)  
D)  
E)  F) All of the above
G) B) and D)

Question 11

Calculate to four significant figures
a.the mass defect in kg and
b.the energy released in kJ/mol,when a neutron decays to produce a proton and an electron.The neutron,proton and electron masses are 1.67493 $\times$ 10-27 kg,1.67262 $\times$ 10-27 kg and 9.10939 $\times$ 10-31 kg,respectively.

Accepted Answer

a.1.399

10^-30<...

Question 12

The radioisotope 
Will decay through

Accepted Answer

A)  ( α\alphaα  decay.) 
B)  ( β\betaβ  decay.) 
C)  ( γ\gammaγ  decay.) 
D)  electron capture.
E)  spontaneous fission. F) A) and B)
G) A) and C)

Question 13

Carbon-14 will emit a  β\betaβ  particle with an energy of 0.1565 MeV.What is this energy in joules?

Accepted Answer

A)  1.0  ×	imes×  10-24 J
B)  2.5  ×	imes×  10-20 J
C)  1.0  ×	imes×  10-18 J
D)  2.5  ×	imes×  10-14 J
E)  None of these choices is correct. F) A) and B)
G) A) and C)

Question 14

Exposure to 10 nCi for 10 minutes is more hazardous for a child than for an adult because

Accepted Answer

A)  the child's cells are dividing more rapidly than the adult's and are,therefore,more susceptible to the radiation.
B)  the child's smaller body size makes the effective dose larger for the child than for the adult.
C)  the child's immune system is not developed well enough to resist damage.
D)  the child's skin is not as thick as an adult's and cannot block as much radiation.
E)  None of these reasons is correct.F) B) and C)
G) A) and E)

Question 15

The isotopes 
And 
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)  beta decay.
D)  gamma decay.
E)  fission.F) A) and B)
G) A) and C)

Question 16

An 85-kg person exposed to barium-141 receives 2.5  ×	imes×  105  β\betaβ  particles,each with an energy of 5.2  ×	imes×  10-13 J.How many rads does the person receive?

Accepted Answer

A)  2.4  ×	imes×  10-20
B)  1.5  ×	imes×  10-7
C)  1.8  ×	imes×  10-16
D)  6.1  ×	imes×  10-15
E)  None of these choices is correct. F) B) and E)
G) B) and C)

Question 17

Which of the following isotopes is most likely to be unstable?

Accepted Answer

A)  
B)  
C)  
D)  
E)  F) C) and E)
G) A) and E)

Question 18

A 30.0-kg child receives 2.65  ×	imes×  107  β\betaβ  particles,each with an energy of 4.60  ×	imes× 0 10-13 J.If the RBE = 0.78,how many millirem did the child receive?

Accepted Answer

A)  3.2  ×	imes×  10-7
B)  5.2  ×	imes×  10-7
C)  5.2  ×	imes×  10-4
D)  3.2  ×	imes×  10-2
E)  None of these choices is correct. F) A) and E)
G) A) and D)

Question 19

What is the mechanism by which control rods slow down the fission rate in a nuclear reactor?

Accepted Answer

Control rods absorb neutrons which would...

Question 20

A bottle of vintage red wine has lost its label.The concentration of tritium (  
)in the wine is 0.34 times that found in freshly bottled wines.If the half-life of tritium is 12.3 years,estimate the time elapsed since the wine was bottled.

Accepted Answer

The answer of A bottle of vintage red wine has...

Exam 23: Nuclear Reactions and Their Applications

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

Correct Answer
verified

What is the specific activity (in Ci/g) of an isotope if 3.56 mg emits 4.26 $\times$ 10⁸ $\beta$ particles per second?

Correct Answer
verified

An 85-kg person exposed to barium-141 receives 2.5 $\times$ 10⁵ $\beta$ particles,each with an energy of 5.2 $\times$ 10^-13 J.How many rads does the person receive?

Correct Answer
verified

Cesium-134 is a $\beta$ emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

Correct Answer
verified

Calculate to four significant figures a.the mass defect in kg and b.the energy released in kJ/mol,when a neutron decays to produce a proton and an electron.The neutron,proton and electron masses are 1.67493 $\times$ 10^-27 kg,1.67262 $\times$ 10^-27 kg and 9.10939 $\times$ 10^-31 kg,respectively.

Correct Answer
verified
a.1.399 10^-30<...
View Answer

Identify the missing species in the following nuclear transmutation.

Correct Answer
verified

Carbon-14 will emit a $\beta$ particle with an energy of 0.1565 MeV.What is this energy in joules?

Correct Answer
verified

Write a complete,balanced equation to represent the beta decay of thallium-207.

Correct Answer
verified

An isotope with Z > 83,which lies close to the band of stability,will generally decay through

Correct Answer
verified

Most foodstuffs contain natural,radioactive isotopes.

Correct Answer
verified

Which of the following isotopes is most likely to be unstable?

Correct Answer
verified

Exposure to 10 nCi for 10 minutes is more hazardous for a child than for an adult because

Correct Answer
verified

A 30.0-kg child receives 2.65 $\times$ 10⁷ $\beta$ particles,each with an energy of 4.60 $\times$ 0 10^-13 J.If the RBE = 0.78,how many millirem did the child receive?

Correct Answer
verified

A bottle of vintage red wine has lost its label.The concentration of tritium ( )in the wine is 0.34 times that found in freshly bottled wines.If the half-life of tritium is 12.3 years,estimate the time elapsed since the wine was bottled.

Correct Answer
verified

The radioisotope $The radioisotope Will decay through A) ( \alpha decay.) B) ( \beta decay.) C) ( \gamma decay.) D) electron capture. E) spontaneous fission.$ Will decay through

Correct Answer
verified

Correct Answer
verified

What is the mechanism by which control rods slow down the fission rate in a nuclear reactor?

Correct Answer
verified
Control rods absorb neutrons which would...
View Answer

Correct Answer
verified

Which one of the following equations correctly represents positron decay of ?

Correct Answer
verified

Positron decay and electron capture have the same net effect on the Z and N values of a nucleus.

Correct Answer
verified

Exam 23: Nuclear Reactions and Their Applications

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

Correct AnswerverifiedShow Answer

What is the specific activity (in Ci/g) of an isotope if 3.56 mg emits 4.26 ×\times× 108 β\betaβ particles per second?

Correct AnswerverifiedShow Answer

An 85-kg person exposed to barium-141 receives 2.5 ×\times× 105 β\betaβ particles,each with an energy of 5.2 ×\times× 10-13 J.How many rads does the person receive?

Correct AnswerverifiedShow Answer

Cesium-134 is a β\betaβ emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

Correct AnswerverifiedShow Answer

Correct Answerverifieda.1.399 10-30<...View AnswerShow Answer

Identify the missing species in the following nuclear transmutation.

Correct AnswerverifiedShow Answer

Carbon-14 will emit a β\betaβ particle with an energy of 0.1565 MeV.What is this energy in joules?

Correct AnswerverifiedShow Answer

Write a complete,balanced equation to represent the beta decay of thallium-207.

Correct AnswerverifiedShow Answer

An isotope with Z > 83,which lies close to the band of stability,will generally decay through

Correct AnswerverifiedShow Answer

Most foodstuffs contain natural,radioactive isotopes.

Correct AnswerverifiedShow Answer

Which of the following isotopes is most likely to be unstable?

Correct AnswerverifiedShow Answer

Exposure to 10 nCi for 10 minutes is more hazardous for a child than for an adult because

Correct AnswerverifiedShow Answer

A 30.0-kg child receives 2.65 ×\times× 107 β\betaβ particles,each with an energy of 4.60 ×\times× 0 10-13 J.If the RBE = 0.78,how many millirem did the child receive?

Correct AnswerverifiedShow Answer

A bottle of vintage red wine has lost its label.The concentration of tritium ( )in the wine is 0.34 times that found in freshly bottled wines.If the half-life of tritium is 12.3 years,estimate the time elapsed since the wine was bottled.

Correct AnswerverifiedShow Answer

The radioisotope Will decay through

Correct AnswerverifiedShow Answer

The isotopes of promethium, And ,are unstable,and lie on opposite sides of the "line of stability".Which of the following combinations is most likely to represent the type of decay for these isotopes?

Correct AnswerverifiedShow Answer

What is the mechanism by which control rods slow down the fission rate in a nuclear reactor?

Correct AnswerverifiedControl rods absorb neutrons which would...View AnswerShow Answer

Correct AnswerverifiedShow Answer

Which one of the following equations correctly represents positron decay of ?

Correct AnswerverifiedShow Answer

Positron decay and electron capture have the same net effect on the Z and N values of a nucleus.

Correct AnswerverifiedShow Answer

Correct Answer
verified

What is the specific activity (in Ci/g) of an isotope if 3.56 mg emits 4.26 $\times$ 10⁸ $\beta$ particles per second?

Correct Answer
verified

An 85-kg person exposed to barium-141 receives 2.5 $\times$ 10⁵ $\beta$ particles,each with an energy of 5.2 $\times$ 10^-13 J.How many rads does the person receive?

Correct Answer
verified

Cesium-134 is a $\beta$ emitter with a half-life of 2.0 years.How much of a 2.50-g sample of cesium-134 will remain after 10 years?

Correct Answer
verified

Correct Answer
verified
a.1.399 10^-30<...
View Answer

Correct Answer
verified

Carbon-14 will emit a $\beta$ particle with an energy of 0.1565 MeV.What is this energy in joules?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

A 30.0-kg child receives 2.65 $\times$ 10⁷ $\beta$ particles,each with an energy of 4.60 $\times$ 0 10^-13 J.If the RBE = 0.78,how many millirem did the child receive?

Correct Answer
verified

Correct Answer
verified

The radioisotope $The radioisotope Will decay through A) ( \alpha decay.) B) ( \beta decay.) C) ( \gamma decay.) D) electron capture. E) spontaneous fission.$ Will decay through

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Control rods absorb neutrons which would...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified