Question 1

Nuclear fusion:

Accepted Answer

A)  requires intense temperatures that make it impossible to harness as an energy source with our current technology.
B)  is the basis of the hydrogen bomb.
C)  can be done but requires the detonation of a traditional fission bomb.
D)  is a possible energy source of the future.
E)  all of the above

Question 2

What happens to the mass number of a nucleus that emits an alpha particle?

Accepted Answer

A)  It remains the same.
B)  It decreases by two.
C)  It decreases by four.
D)  It increases by two.
E)  It increases by four.

Question 3

Nuclear power is criticized because:

Accepted Answer

A)  of long term storage issues of radioactive wastes.
B)  it is an expensive form of energy.
C)  it is not as efficient as burning fossil fuels.
D)  of the danger of detonation into a nuclear bomb.
E)  all of the above

Question 4

What happens to the atomic number of a nucleus that emits a beta particle?.

Accepted Answer

A)  It remains the same.
B)  It increases by one.
C)  It decreases by one.
D)  It increases by two.
E)  It decreases by two.

Question 5

Which of the following types of radiation has the highest penetrating power?

Accepted Answer

A)  alpha particles
B)  beta particles
C)  gamma rays
D)  positrons
E)  none of the above

Question 6

What is the main product when 
Undergoes alpha decay?

Accepted Answer

A)   
B)   
C)   
D)   
E)  none of the above

Question 7

If an object is 17,190 yrs old,what is the C-14 (t1/2 = 5,730 yrs) activity as compared to a living organism?

Accepted Answer

A)  6 half-lives
B)  5 half-lives
C)  4 half-lives
D)  3 half-lives
E)  More information is needed.

Question 8

All unstable elements have the same rates of radioactive decay.

Accepted Answer

A) True 
 B)False

Question 9

The radioactive gas radon

Accepted Answer

A)  is a product of the radioactive decay series of uranium.
B)  is the single greatest source of human radiation exposure.
C)  is more hazardous for smokers than nonsmokers.
D)  all of the above
E)  none of the above

Question 10

What is the missing particle?

Accepted Answer

A)  positron
B)  beta particle
C)  alpha particle
D)  gamma particle
E)  none of the above

Question 11

During the first half-life you lose half of the radioactive material,during the second half life you lose the remaining half.

Accepted Answer

A) True 
 B)False

Question 12

The hydrogen isotope known as tritium contains three neutrons.

Accepted Answer

A) True 
 B)False

Question 13

Which statement about positron emission is FALSE?

Accepted Answer

A)  occurs when a proton is converted into a neutron and a positron
B)  symbol is: + 
E)  All of the above are true." class="answers-bank-image d-inline" rel="preload" >
C)  occurs with alpha and beta decay
D)  alternative symbol is β+
E)  All of the above are true.

Question 14

Which of the following isotopes contains the most number of neutrons?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 15

Nuclear power:

Accepted Answer

A)  generates 20% of the electricity needed in the US.
B)  generates heat which boils water and turns a steam turbine to produce electricity.
C)  generates no air pollution or greenhouse gases.
D)  uses almost no fuel compared to fossil fuel plants.
E)  All of the above are true.

Question 16

Which of the following is NOT a type of radioactive emission?

Accepted Answer

A)  alpha rays
B)  beta rays
C)  gamma rays
D)  positrons
E)  All of the above are types of radioactive emissions.

Question 17

Nuclides that decay slowly have long half-lives.

Accepted Answer

A) True 
 B)False

Question 18

If an object has 6.25% of the C-14 (t1/2 = 5,730 yrs) activity as a living organism,the age of the item is:

Accepted Answer

A)  11,460 years.
B)  17,190 years.
C)  22,920 years.
D)  28,650 years.
E)  More information is needed.

Question 19

A 1.2 kg sample of Th-228 has a half-life of 1.9 years.How many grams of Th is left after 11.4 years?

Accepted Answer

A)  18.8
B)  9.4
C)  37.5
D)  0
E)  none of the above

Question 20

Radioactive particles can pass through matter.

Accepted Answer

A) True 
 B)False

Exam 17: Radioactivity and Nuclear Chemistry

What happens to the atomic number of a nucleus that emits a beta particle?.

Correct AnswerverifiedShow Answer

If an object is 17,190 yrs old,what is the C-14 (t1/2 = 5,730 yrs) activity as compared to a living organism?

Correct AnswerverifiedShow Answer

If an object has 6.25% of the C-14 (t1/2 = 5,730 yrs) activity as a living organism,the age of the item is:

Correct AnswerverifiedShow Answer

Which statement about positron emission is FALSE?

Correct AnswerverifiedShow Answer

Nuclear power:

Correct AnswerverifiedShow Answer

Which of the following is NOT a type of radioactive emission?

Correct AnswerverifiedShow Answer

Nuclear power is criticized because:

Correct AnswerverifiedShow Answer

The radioactive gas radon

Correct AnswerverifiedShow Answer

What is the missing particle?

Correct AnswerverifiedShow Answer

A 1.2 kg sample of Th-228 has a half-life of 1.9 years.How many grams of Th is left after 11.4 years?

Correct AnswerverifiedShow Answer

Nuclear fusion:

Correct AnswerverifiedShow Answer

Which of the following isotopes contains the most number of neutrons?

Correct AnswerverifiedShow Answer

What is the main product when Undergoes alpha decay?

Correct AnswerverifiedShow Answer

During the first half-life you lose half of the radioactive material,during the second half life you lose the remaining half.

Correct AnswerverifiedShow Answer

All unstable elements have the same rates of radioactive decay.

Correct AnswerverifiedShow Answer

Radioactive particles can pass through matter.

Correct AnswerverifiedShow Answer

Which of the following types of radiation has the highest penetrating power?

Correct AnswerverifiedShow Answer

What happens to the mass number of a nucleus that emits an alpha particle?

Correct AnswerverifiedShow Answer

Nuclides that decay slowly have long half-lives.

Correct AnswerverifiedShow Answer

The hydrogen isotope known as tritium contains three neutrons.

Correct AnswerverifiedShow Answer

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If an object is 17,190 yrs old,what is the C-14 (t_1/2 = 5,730 yrs) activity as compared to a living organism?

Correct Answer
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If an object has 6.25% of the C-14 (t_1/2 = 5,730 yrs) activity as a living organism,the age of the item is:

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