Question 1

What role does cadmium metal (Cd) play in a nuclear reactor?

Accepted Answer

A)  slows down the fission neutrons (moderator) 
B)  transfers heat from the reactor to the heat exchanger (primary coolant) 
C)  controls chain reaction (control rods) 
D)  transfers heat from the condenser to the environment (cooling tower) 
E)  undergoes fission (fuel rods) F) C) and E)
G) A) and E)

Question 2

Charcoal samples taken from holes dug at Stonehenge, England, have a carbon-14 specific activity of 9.50 dpm per gram carbon. Living wood has a specific activity of 15.3 dpm per gram of carbon.Given that the half-life of carbon-14 is 5730 yr, how long ago was the wood part of a living plant?

Accepted Answer

A)  3940 yr
B)  3550 yr
C)  9230 yr
D)  5700 yr
E)  13300 yrF) B) and C)
G) A) and C)

Question 3

Beta particles are identical to

Accepted Answer

A)  protons.
B)  helium atoms.
C)  hydrogen atoms.
D)  helium nuclei.
E)  electrons.F) A) and B)
G) D) and E)

Question 4

Balance the equation

Accepted Answer

The answer of Balance the equation ...

Question 5

Which type of nuclear process requires an extremely high temperature (millions of degrees) ?

Accepted Answer

A)  beta decay
B)  fission reaction
C)  fusion reaction
D)  alpha decay
E)  positron emissionF) C) and D)
G) C) and E)

Question 6

The energy equivalent of 1 amu is

Accepted Answer

A)  5.0  ×	imes×  10-19 J
B)  5.4  ×	imes×  1043 J
C)  6.6  ×	imes×  109 J
D)  1.5  ×	imes×  10-10 J E) B) and D)
F) C) and D)

Question 7

Compare nuclear reactions with chemical reactions in terms of the quantity of energy released.

Accepted Answer

Nuclear reactions release far ...

Question 8

How many 14C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For 14C, t1/2 = 5,730 yr.)

Accepted Answer

A)  2.9  ×	imes×  107 atoms
B)  8.0  ×	imes×  10-7 atoms
C)  1.4  ×	imes×  1014 atoms
D)  1.5  ×	imes×  1013 atoms
E)  6.02  ×	imes×  1020 atoms F) B) and E)
G) A) and B)

Question 9

What fraction of radioactive atoms remains in a sample after six half-lives?

Accepted Answer

A)  zero
B)  1/6
C)  1/16
D)  1/32
E)  1/64F) B) and E)
G) A) and E)

Question 10

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10-7 mole of tritium, how many moles of tritium would be left after 78 years?

Accepted Answer

1.2 <img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30"> 10<su...

Question 11

Lead-209 undergoes beta decay.Write a balanced equation for this reaction.

Accepted Answer

The answer of Lead-209 undergoes beta decay.Write a balanced equation...

Question 12

A radioisotope decays to give an alpha particle and Pb-208. What was the original element?

Accepted Answer

A)  Se
B)  Bi
C)  Po
D)  Hg
E)  RnF) A) and B)
G) B) and D)

Exam 23: Nuclear Chemistry

The energy equivalent of 1 amu is

Correct Answer
verified

Balance the equation

Correct Answer
verified

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

Correct Answer
verified

A radioisotope decays to give an alpha particle and Pb-208. What was the original element?

Correct Answer
verified

Lead-209 undergoes beta decay.Write a balanced equation for this reaction.

Correct Answer
verified

Compare nuclear reactions with chemical reactions in terms of the quantity of energy released.

Correct Answer
verified
Nuclear reactions release far ...
View Answer

Charcoal samples taken from holes dug at Stonehenge, England, have a carbon-14 specific activity of 9.50 dpm per gram carbon. Living wood has a specific activity of 15.3 dpm per gram of carbon.Given that the half-life of carbon-14 is 5730 yr, how long ago was the wood part of a living plant?

Correct Answer
verified

What fraction of radioactive atoms remains in a sample after six half-lives?

Correct Answer
verified

Beta particles are identical to

Correct Answer
verified

What role does cadmium metal (Cd) play in a nuclear reactor?

Correct Answer
verified

Which type of nuclear process requires an extremely high temperature (millions of degrees) ?

Correct Answer
verified

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, how many moles of tritium would be left after 78 years?

Correct Answer
verified
1.2 10
View Answer

Exam 23: Nuclear Chemistry

The energy equivalent of 1 amu is

Correct AnswerverifiedShow Answer

Balance the equation

Correct AnswerverifiedShow Answer

How many 14C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For 14C, t1/2 = 5,730 yr.)

Correct AnswerverifiedShow Answer

A radioisotope decays to give an alpha particle and Pb-208. What was the original element?

Correct AnswerverifiedShow Answer

Lead-209 undergoes beta decay.Write a balanced equation for this reaction.

Correct AnswerverifiedShow Answer

Compare nuclear reactions with chemical reactions in terms of the quantity of energy released.

Correct AnswerverifiedNuclear reactions release far ...View AnswerShow Answer

Charcoal samples taken from holes dug at Stonehenge, England, have a carbon-14 specific activity of 9.50 dpm per gram carbon. Living wood has a specific activity of 15.3 dpm per gram of carbon.Given that the half-life of carbon-14 is 5730 yr, how long ago was the wood part of a living plant?

Correct AnswerverifiedShow Answer

What fraction of radioactive atoms remains in a sample after six half-lives?

Correct AnswerverifiedShow Answer

Beta particles are identical to

Correct AnswerverifiedShow Answer

What role does cadmium metal (Cd) play in a nuclear reactor?

Correct AnswerverifiedShow Answer

Which type of nuclear process requires an extremely high temperature (millions of degrees) ?

Correct AnswerverifiedShow Answer

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 ×\times× 10-7 mole of tritium, how many moles of tritium would be left after 78 years?

Correct Answerverified1.2 10View AnswerShow Answer

Correct Answer
verified

Correct Answer
verified

How many ¹⁴C atoms are in a charcoal sample that has a decay rate of 3,500 disintegrations per min? (For ¹⁴C, t_1/2 = 5,730 yr.)

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Nuclear reactions release far ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Tritium is a radioisotope of hydrogen having a half-life of 12.3 years.If you initially had 1.0 $\times$ 10^-7 mole of tritium, how many moles of tritium would be left after 78 years?

Correct Answer
verified
1.2 10
View Answer