Question 1

A neutron star has approximately the same density as nuclear material. A typical neutron star has a radius of 8.0 km. Using the relationship r = (1.2 fm)  A1/3 together with the mass of a neutron, 1.67 × 10−27kg, estimate the mass of a neutron star.

Accepted Answer

A)   0.65 × 1030 kg
B)   1.5 × 1030 kg
C)   0.16 × 1030 kg
D)   0.49 × 1030 kgE) C) and D)
F) A) and D)

Question 2

Compared to the sum of the masses of its constituents, the mass of a nucleus (other than 1H)  is

Accepted Answer

A)   the same.
B)   greater.
C)   less.
D)   could be any of the above.E) A) and C)
F) B) and C)

Question 3

A unstable medium-sized nucleus with an equal number of protons and neutrons (Z = N)  is most likely to decay via

Accepted Answer

A)   gamma decay
B)   β+ decay
C)   β− decay
D)   α decay
E)   spontaneous fissionF) B) and D)
G) A) and B)

Question 4

Barium-137 emits a gamma ray in the decay from an excited state (137Ba*) . What is the resulting daughter nuclide?

Accepted Answer

A)   (137Cs) 
B)  ( 137Ba) 
C)  ( 137La) 
D)  ( 136Ba) 
E)   (136Cs) F) A) and B)
G) A) and C)

Question 5

Manganese-67 +decay C)  β− decay D)  α decay E)  spontaneous fission" class="answers-bank-image d-inline" rel="preload" > is an unstable nuclide. Which type of radioactive decay is it most likely to undergo?

Accepted Answer

A)   gamma decay
B)   β+decay
C)   β− decay
D)   α decay
E)   spontaneous fissionF) A) and D)
G) B) and D)

Question 6

One mole of 40Ar (Z = 18)  has about what mass?

Accepted Answer

A)   18 g
B)   22 g
C)   40 kg
D)   40 g
E)   22 kgF) None of the above
G) B) and D)

Question 7

Stars are powered by nuclear fusion in their cores, which, starting with hydrogen, produce progressively heavier elements. Near the end of a star's lifetime, stellar cores produce iron by fusion. The reason this process doesn't proceed beyond iron is that

Accepted Answer

A)   iron in stellar cores tends to undergo spontaneous fission.
B)   iron is the most dense material in solid form.
C)   iron nuclei have the greatest binding energy per nucleon.
D)   iron is ferromagnetic.
E)   iron is heavy.F) C) and D)
G) B) and D)

Question 8

How many neutrons are in a 15C nucleus?

Accepted Answer

A)   7
B)   8
C)   6
D)   9E) A) and B)
F) B) and C)

Question 9

When a nucleus of a given isotope decays, it

Accepted Answer

A)   cannot produce a daughter with the same mass number.
B)   always produces a daughter with a lower mass number.
C)   cannot produce a daughter with a lower mass number.
D)   cannot produce a daughter with a higher mass number.
E)   always produces a daughter with a higher mass number.F) B) and C)
G) B) and E)

Question 10

A nuclear chain reaction is possible (for the isotopes that can participate in a chain reaction)  because when each nucleus fissions, it produces

Accepted Answer

A)   more neutrons than are required to induce fission in one nucleus.
B)   more energy than is required to induce fission in one nucleus.
C)   daughters that can also be induced to fission to produce more energy.
D)   daughters that can fuse together to make more of the same isotope.E) B) and D)
F) B) and C)

Question 11

What is the density of the 238U nucleus?

Accepted Answer

A)   2.3 × 1017 kg/m3
B)   9.6 × 1014 kg/m3
C)   3.2 × 1014 kg/m3
D)   2.38 × 105 kg/m3
E)   1.0 × 103 kg/m3F) A) and B)
G) A) and C)

Question 12

The particles in the nucleus referred to as nucleons are

Accepted Answer

A)   electrons and protons.
B)   protons and neutrons.
C)   neutrons and electrons.
D)   electrons and photons.E) C) and D)
F) A) and B)

Question 13

The three most common types of radiation emitted by radioactive nuclei were originally named alpha, beta, and gamma rays, after the first letters of the Greek alphabet. In order of increasing ability to penetrate matter, these are

Accepted Answer

A)   alpha, beta, gamma.
B)   beta, gamma, alpha.
C)   gamma, alpha, beta.
D)   alpha, gamma, beta.
E)   gamma, beta, alpha.F) A) and C)
G) A) and D)

Question 14

What is the radius of the nuclide  ?

Accepted Answer

A)   7.4 fm
B)   5.4 fm
C)   290 fm
D)   1.8 fmE) None of the above
F) B) and C)

Question 15

Complete the following induced reaction:  +  →  + ?

Accepted Answer

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

Question 16

The isotope A261 decays by beta-plus decay. What is the daughter nucleus?

Accepted Answer

A)   (27Al) 
B)   (25Al) 
C)   (26Mg) 
D)   (26Si) 
E)   (26Al) F) B) and D)
G) B) and E)

Question 17

It is common to illustrate the density of nuclear matter by discussing the mass of a teaspoon of nuclear material. The volume of a teaspoon is about 5 cm3. Using the relationship r = (1.2 fm)  A1/3 together with the mass of a proton, 1.67 × 10−27 kg, estimate the mass of a teaspoon of nuclear material.

Accepted Answer

A)   3.8 × 1011 kg
B)   9.6 × 1011kg
C)   1.53 × 1012 kg
D)   1.15 × 1012 kgE) A) and C)
F) None of the above

Question 18

How many neutrons are produced in the following induced fission reaction? n1 + 1 +   →   r +   e + neutrons A)  2 B)  0 C)  1 D)  3" class="answers-bank-image d-inline" rel="preload" > → 1 +   →   r +   e + neutrons A)  2 B)  0 C)  1 D)  3" class="answers-bank-image d-inline" rel="preload" > r + 1 +   →   r +   e + neutrons A)  2 B)  0 C)  1 D)  3" class="answers-bank-image d-inline" rel="preload" > e + neutrons

Accepted Answer

A)   2
B)   0
C)   1
D)   3E) A) and D)
F) All of the above

Question 19

What is the mass defect of an alpha particle?

Accepted Answer

A)   0.03038 u
B)   0.30377 u
C)   0.03147 u
D)   0.02928 uE) A) and D)
F) A) and C)

Question 20

If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 must be consumed each day to keep a 350 MW plant producing at capacity? Assume the power plant is 35% efficient.

Accepted Answer

A)   5.2 kg
B)   1.8 kg
C)   0.43 kg
D)   1.2 kgE) A) and D)
F) None of the above

Exam 29: Nuclear Physics

One mole of ⁴⁰Ar (Z = 18) has about what mass?

Correct Answer
verified

A neutron star has approximately the same density as nuclear material. A typical neutron star has a radius of 8.0 km. Using the relationship r = (1.2 fm) A^1/3 together with the mass of a neutron, 1.67 × 10⁻²⁷kg, estimate the mass of a neutron star.

Correct Answer
verified

A unstable medium-sized nucleus with an equal number of protons and neutrons (Z = N) is most likely to decay via

Correct Answer
verified

The three most common types of radiation emitted by radioactive nuclei were originally named alpha, beta, and gamma rays, after the first letters of the Greek alphabet. In order of increasing ability to penetrate matter, these are

Correct Answer
verified

The isotope A₂₆1 decays by beta-plus decay. What is the daughter nucleus?

Correct Answer
verified

The particles in the nucleus referred to as nucleons are

Correct Answer
verified

Compared to the sum of the masses of its constituents, the mass of a nucleus (other than ¹H) is

Correct Answer
verified

If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 must be consumed each day to keep a 350 MW plant producing at capacity? Assume the power plant is 35% efficient.

Correct Answer
verified

When a nucleus of a given isotope decays, it

Correct Answer
verified

How many neutrons are produced in the following induced fission reaction? n₁ + → r + e + neutrons

Correct Answer
verified

Complete the following induced reaction: + → + ?

Correct Answer
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How many neutrons are in a ¹⁵C nucleus?

Correct Answer
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What is the mass defect of an alpha particle?

Correct Answer
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Manganese-67 is an unstable nuclide. Which type of radioactive decay is it most likely to undergo?

Correct Answer
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What is the radius of the nuclide ?

Correct Answer
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Barium-137 emits a gamma ray in the decay from an excited state (¹³⁷Ba^*) . What is the resulting daughter nuclide?

Correct Answer
verified

Stars are powered by nuclear fusion in their cores, which, starting with hydrogen, produce progressively heavier elements. Near the end of a star's lifetime, stellar cores produce iron by fusion. The reason this process doesn't proceed beyond iron is that

Correct Answer
verified

Correct Answer
verified

A nuclear chain reaction is possible (for the isotopes that can participate in a chain reaction) because when each nucleus fissions, it produces

Correct Answer
verified

What is the density of the ²³⁸U nucleus?

Correct Answer
verified

Exam 29: Nuclear Physics

One mole of 40Ar (Z = 18) has about what mass?

Correct AnswerverifiedShow Answer

A neutron star has approximately the same density as nuclear material. A typical neutron star has a radius of 8.0 km. Using the relationship r = (1.2 fm) A1/3 together with the mass of a neutron, 1.67 × 10−27kg, estimate the mass of a neutron star.

Correct AnswerverifiedShow Answer

A unstable medium-sized nucleus with an equal number of protons and neutrons (Z = N) is most likely to decay via

Correct AnswerverifiedShow Answer

The three most common types of radiation emitted by radioactive nuclei were originally named alpha, beta, and gamma rays, after the first letters of the Greek alphabet. In order of increasing ability to penetrate matter, these are

Correct AnswerverifiedShow Answer

The isotope A261 decays by beta-plus decay. What is the daughter nucleus?

Correct AnswerverifiedShow Answer

The particles in the nucleus referred to as nucleons are

Correct AnswerverifiedShow Answer

Compared to the sum of the masses of its constituents, the mass of a nucleus (other than 1H) is

Correct AnswerverifiedShow Answer

If each nuclear fission reaction in a nuclear power plant releases 173 MeV, what quantity of uranium-235 must be consumed each day to keep a 350 MW plant producing at capacity? Assume the power plant is 35% efficient.

Correct AnswerverifiedShow Answer

When a nucleus of a given isotope decays, it

Correct AnswerverifiedShow Answer

How many neutrons are produced in the following induced fission reaction? n1 + → r + e + neutrons

Correct AnswerverifiedShow Answer

Complete the following induced reaction: + → + ?

Correct AnswerverifiedShow Answer

How many neutrons are in a 15C nucleus?

Correct AnswerverifiedShow Answer

What is the mass defect of an alpha particle?

Correct AnswerverifiedShow Answer

Manganese-67 is an unstable nuclide. Which type of radioactive decay is it most likely to undergo?

Correct AnswerverifiedShow Answer

What is the radius of the nuclide ?

Correct AnswerverifiedShow Answer

Barium-137 emits a gamma ray in the decay from an excited state (137Ba*) . What is the resulting daughter nuclide?

Correct AnswerverifiedShow Answer

Stars are powered by nuclear fusion in their cores, which, starting with hydrogen, produce progressively heavier elements. Near the end of a star's lifetime, stellar cores produce iron by fusion. The reason this process doesn't proceed beyond iron is that

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

A nuclear chain reaction is possible (for the isotopes that can participate in a chain reaction) because when each nucleus fissions, it produces

Correct AnswerverifiedShow Answer

What is the density of the 238U nucleus?

Correct AnswerverifiedShow Answer

One mole of ⁴⁰Ar (Z = 18) has about what mass?

Correct Answer
verified

A neutron star has approximately the same density as nuclear material. A typical neutron star has a radius of 8.0 km. Using the relationship r = (1.2 fm) A^1/3 together with the mass of a neutron, 1.67 × 10⁻²⁷kg, estimate the mass of a neutron star.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

The isotope A₂₆1 decays by beta-plus decay. What is the daughter nucleus?

Correct Answer
verified

Correct Answer
verified

Compared to the sum of the masses of its constituents, the mass of a nucleus (other than ¹H) is

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

How many neutrons are produced in the following induced fission reaction? n₁ + → r + e + neutrons

Correct Answer
verified

Correct Answer
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How many neutrons are in a ¹⁵C nucleus?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Barium-137 emits a gamma ray in the decay from an excited state (¹³⁷Ba^*) . What is the resulting daughter nuclide?

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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What is the density of the ²³⁸U nucleus?

Correct Answer
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