Question 1

The product from the alpha decay of  U is ________.

Accepted Answer

A)    Np
B)    Pu
C)    Th
D)    Ra
E)    UF) None of the above
G) C) and D)

Question 2

The half-life of a radioisotope is ________.

Accepted Answer

A)  one-half of the time it takes for the radioisotope to completely decay to a nonradioactive isotope
B)  the time it takes for the radioisotope to become an isotope with one-half of the atomic weight of the original radioisotope
C)  the time it takes for the radioisotope to become an isotope with one-half the atomic number of the original radioisotope
D)  the time it takes for the radioisotope to lose one-half of its neutrons
E)  the time it takes for one-half of the sample to decayF) A) and B)
G) B) and E)

Question 3

In the nuclear equation of beta decay,________.

Accepted Answer

A)  the new nucleus contains 2 fewer protons
B)  the new nucleus contains 2 more protons
C)  the mass number of the new nucleus is 4 less than that of the original nucleus
D)  the new nucleus contains 1 more proton
E)  the new nucleus contains 1 less protonF) B) and C)
G) A) and D)

Question 4

The SI unit used to measure the activity of a radioactive sample is called the ________.

Accepted Answer

A)  rad
B)  gray
C)  sievert
D)  rem
E)  BqF) B) and E)
G) A) and B)

Question 5

One symbol for the beta particle is β.Another symbol for the same particle is ________.

Accepted Answer

The answer of One symbol for the beta particle is...

Question 6

A person begins to suffer radiation sickness at an exposure level of ________.

Accepted Answer

A)  25 rem
B)  5 rem
C)  500 rem
D)  100 rem
E)  600 remF) A) and B)
G) D) and E)

Question 7

There are ________ microcuries in one millicurie.

Accepted Answer

The answer of There are ________ microcuries in one millicurie....

Question 8

One symptom of radiation sickness is an increased production of red blood cells.

Accepted Answer

A) True 
 B)False

Question 9

In the sun,nuclei of hydrogen combine to form a larger nucleus and release a great amount of energy.The process is known as ________.

Accepted Answer

A)  fission
B)  fusion
C)  metathesis
D)  chain reaction
E)  ionizationF) A) and E)
G) B) and E)

Question 10

The combination of H-3 and H-2 to give He-4 and a neutron is called nuclear ________.

Accepted Answer

The answer of The combination of H-3 and H-2 to...

Question 11

After two half-lives,the radioactivity of a sample is ________ of its original activity.

Accepted Answer

The answer of After two half-lives,the radioactivity of a sample...

Question 12

A radiation lab orders 64 μCi of P-32.After 42.9 days the activity of the sample is 8.0 μCi.What is the half-life of P-32?

Accepted Answer

A)  7.15 days
B)  14.3 days
C)  28.6 days
D)  42.9 days
E)  85.8 daysF) C) and D)
G) A) and B)

Question 13

Iodine-123,which is used for diagnostic imaging in the thyroid,has a half-life of 13 h.If 50.0 mg of I-123 were prepared at 8:00 A.M.on Monday,how many mg remain at 10:00 A.M.on the following day?

Accepted Answer

A)  50.0 mg
B)  25.0 mg
C)  12.5 mg
D)  6.25 mg
E)  3.13 mgF) B) and E)
G) A) and B)

Question 14

The shielding required for gamma rays is ________.

Accepted Answer

lead or th...

Question 15

When a positron is emitted,the atomic number stays the same.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is suitable as a minimum shielding for beta particles?

Accepted Answer

A)  air
B)  1 sheet of paper
C)  gloves
D)  1 m of concrete
E)  1 cm of leadF) B) and C)
G) A) and B)

Question 17

When beta particles are emitted,the atomic number decreases.

Accepted Answer

A) True 
 B)False

Question 18

CT scans are based on the adsorption of X-rays.

Accepted Answer

A) True 
 B)False

Question 19

One mCi of a radioactive substance emits more radiation than one μCi of the same substance.

Accepted Answer

A) True 
 B)False

Question 20

The nuclear symbol that completes the equation is a(n) ________.  Am + ? →  Bk +  n

Accepted Answer

A)  proton
B)  neutron
C)  gamma ray
D)  beta particle
E)  alpha particleF) A) and B)
G) All of the above

Exam 5: Nuclear Chemistry

The half-life of a radioisotope is ________.

Correct AnswerverifiedShow Answer

The shielding required for gamma rays is ________.

Correct Answerverifiedlead or th...View AnswerShow Answer

A person begins to suffer radiation sickness at an exposure level of ________.

Correct AnswerverifiedShow Answer

In the nuclear equation of beta decay,________.

Correct AnswerverifiedShow Answer

After two half-lives,the radioactivity of a sample is ________ of its original activity.

Correct AnswerverifiedShow Answer

CT scans are based on the adsorption of X-rays.

Correct AnswerverifiedShow Answer

One symptom of radiation sickness is an increased production of red blood cells.

Correct AnswerverifiedShow Answer

In the sun,nuclei of hydrogen combine to form a larger nucleus and release a great amount of energy.The process is known as ________.

Correct AnswerverifiedShow Answer

There are ________ microcuries in one millicurie.

Correct AnswerverifiedShow Answer

One mCi of a radioactive substance emits more radiation than one μCi of the same substance.

Correct AnswerverifiedShow Answer

Iodine-123,which is used for diagnostic imaging in the thyroid,has a half-life of 13 h.If 50.0 mg of I-123 were prepared at 8:00 A.M.on Monday,how many mg remain at 10:00 A.M.on the following day?

Correct AnswerverifiedShow Answer

Which of the following is suitable as a minimum shielding for beta particles?

Correct AnswerverifiedShow Answer

The nuclear symbol that completes the equation is a(n) ________. Am + ? → Bk + n

Correct AnswerverifiedShow Answer

One symbol for the beta particle is β.Another symbol for the same particle is ________.

Correct AnswerverifiedShow Answer

When beta particles are emitted,the atomic number decreases.

Correct AnswerverifiedShow Answer

When a positron is emitted,the atomic number stays the same.

Correct AnswerverifiedShow Answer

The product from the alpha decay of U is ________.

Correct AnswerverifiedShow Answer

A radiation lab orders 64 μCi of P-32.After 42.9 days the activity of the sample is 8.0 μCi.What is the half-life of P-32?

Correct AnswerverifiedShow Answer

The SI unit used to measure the activity of a radioactive sample is called the ________.

Correct AnswerverifiedShow Answer

The combination of H-3 and H-2 to give He-4 and a neutron is called nuclear ________.

Correct AnswerverifiedShow Answer

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lead or th...
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