Question 1

A radioactive isotope that emits an alpha particle will change in what respect?

Accepted Answer

A)  Atomic number decreases by four. 
B)  Mass number decreases by four. 
C)  Both choices a and b are valid. 
D)  None of the above choices are valid. 
A)  Atomic number decreases by four. 
B)  Mass number decreases by four. 
C)  Both choices a and b are valid. 
D)  None of the above choices are valid.

Question 2

Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.2 × 10−6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 1010 decays/s)

Accepted Answer

A)  1.3E+5 
B)  1.1E+2 
C)  3.5E-6 
D)  4.1E+12 
E)  ​2.9E+12 
A)  1.3E+5 
B)  1.1E+2 
C)  3.5E-6 
D)  4.1E+12 
E)  ​2.9E+12

Question 3

A 1-gram sample of wood is taken from an ancient site.If the Carbon-14 activity of the sample is 19.0% that of present-day organic material,what is the age of the wood? (T1/2 for 14C is 5 730 years)

Accepted Answer

A)  4640 years 
B)  9,520 years 
C)  5520 years 
D)  13,730 years 
E)  ​18,850 years 
A)  4640 years 
B)  9,520 years 
C)  5520 years 
D)  13,730 years 
E)  ​18,850 years

Question 4

The mass of 12C is 12 u where 1 u = 1.660 559 × 10−27 kg.This mass is equal to:

Accepted Answer

A)  the mass of the 12C nucleus. 
B)  the mass of the 12C nucleus plus 6 electrons. 
C)  the mass of the 12C nucleus plus 12 electrons. 
D)  the mass of 6 protons and 6 neutrons. 
A)  the mass of the 12C nucleus. 
B)  the mass of the 12C nucleus plus 6 electrons. 
C)  the mass of the 12C nucleus plus 12 electrons. 
D)  the mass of 6 protons and 6 neutrons.

Question 5

When radium-224 emits an alpha particle,the remaining daughter nucleus is which of the following?

Accepted Answer

A)  lead-213 
B)  actinium-215 
C)  radon-220 
D)  bismuth-215 
A)  lead-213 
B)  actinium-215 
C)  radon-220 
D)  bismuth-215

Question 6

If the stable nuclei are plotted with neutron number vs.proton number,the curve formed by the stable nuclei does not follow the line N = Z.This is predicted by examining how the binding energy is influenced by:

Accepted Answer

A)  the volume of the nucleus. 
B)  the size of the nuclear surface. 
C)  the Coulomb repulsion. 
D)  the proton-neutron mass difference. 
A)  the volume of the nucleus. 
B)  the size of the nuclear surface. 
C)  the Coulomb repulsion. 
D)  the proton-neutron mass difference.

Question 7

Which of the following is not true for both the photon and the neutrino.

Accepted Answer

A)  Both are uncharged. 
B)  Both have spin ħ. 
C)  Both can carry different amounts of momentum. 
D)  Choose this answer if all of the above are true. 
A)  Both are uncharged. 
B)  Both have spin ħ. 
C)  Both can carry different amounts of momentum. 
D)  Choose this answer if all of the above are true.

Question 8

Two different nuclei emit alpha particles,the energy released in each of these decays being the same.Which of the following has the highest resulting kinetic energy?

Accepted Answer

A)  The lighter daughter nucleus. 
B)  The heavier daughter nucleus. 
C)  The alpha particle from the lighter nucleus. 
D)  The alpha particle from the heavier nucleus. 
A)  The lighter daughter nucleus. 
B)  The heavier daughter nucleus. 
C)  The alpha particle from the lighter nucleus. 
D)  The alpha particle from the heavier nucleus.

Question 9

The neutron is radioactive and can beta decay to form a proton.This can occur primarily because:

Accepted Answer

A)  the proton has less mass than a neutron. 
B)  there are several hydrogen isotopes. 
C)  of the binding energy of hydrogen. 
D)  the neutron is neutral. 
A)  the proton has less mass than a neutron. 
B)  there are several hydrogen isotopes. 
C)  of the binding energy of hydrogen. 
D)  the neutron is neutral.

Question 10

The atomic number of a given element is equivalent to which of the following?

Accepted Answer

A)  proton number in the nucleus 
B)  neutron number in the nucleus 
C)  sum of the protons and neutrons in the nucleus 
D)  number of electrons in the outer shells 
A)  proton number in the nucleus 
B)  neutron number in the nucleus 
C)  sum of the protons and neutrons in the nucleus 
D)  number of electrons in the outer shells

Question 11

The isotope 64Zn has a nuclear radius of 4.8 ×10−15 m.Which of the following is the mass number of an isotope for which the nuclear radius is 3.6 ×10−15 m?

Accepted Answer

A)  3 
B)  1 
C)  9 
D)  27 
E)  ​48 
A)  3 
B)  1 
C)  9 
D)  27 
E)  ​48

Question 12

A radioactive isotope that emits a gamma quantum will change in what respect?

Accepted Answer

A)  Atomic number increases by one. 
B)  Atomic number decreases by one. 
C)  Atomic mass number decreases by one. 
D)  None of the above choices are valid. 
A)  Atomic number increases by one. 
B)  Atomic number decreases by one. 
C)  Atomic mass number decreases by one. 
D)  None of the above choices are valid.

Question 13

Which of the following is not a unit of radiation dose?

Accepted Answer

A)  rem 
B)  roentgen 
C)  rad 
D)  RBE 
A)  rem 
B)  roentgen 
C)  rad 
D)  RBE

Question 14

A particle is fired at a target nucleus in which a reaction that could occur has a negative Q value.Which of the following statements is true?

Accepted Answer

A)  The kinetic energy of the bombarding particle can be any amount for the reaction to occur. 
B)  The kinetic energy of the bombarding particle must be equal to the absolute value of the Q value for the reaction to occur. 
C)  The kinetic energy of the bombarding particle was greater than the absolute value of the Q value if the reaction occurred. 
D)  The Q value has nothing to do with whether or not the reaction can occur. 
A)  The kinetic energy of the bombarding particle can be any amount for the reaction to occur. 
B)  The kinetic energy of the bombarding particle must be equal to the absolute value of the Q value for the reaction to occur. 
C)  The kinetic energy of the bombarding particle was greater than the absolute value of the Q value if the reaction occurred. 
D)  The Q value has nothing to do with whether or not the reaction can occur.

Question 15

Calculate the binding energy per nucleon of the tritium nucleus,  
,given that the mass of the tritium nucleus is 3.016 05 u.(mp = 1.007 276 u,mn = 1.008 665,and 1 u = 931.5 MeV/c2)

Accepted Answer

A)  2.24 MeV/nucleon 
B)  2.45 MeV/nucleon 
C)  2.66 MeV/nucleon 
D)  2.86 MeV/nucleon 
A)  2.24 MeV/nucleon 
B)  2.45 MeV/nucleon 
C)  2.66 MeV/nucleon 
D)  2.86 MeV/nucleon

Exam 29: Nuclear Physics

A radioactive isotope that emits an alpha particle will change in what respect?

Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.2 × 10−6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 1010 decays/s)

A 1-gram sample of wood is taken from an ancient site.If the Carbon-14 activity of the sample is 19.0% that of present-day organic material,what is the age of the wood? (T1/2 for 14C is 5 730 years)

The mass of 12C is 12 u where 1 u = 1.660 559 × 10−27 kg.This mass is equal to:

When radium-224 emits an alpha particle,the remaining daughter nucleus is which of the following?

If the stable nuclei are plotted with neutron number vs.proton number,the curve formed by the stable nuclei does not follow the line N = Z.This is predicted by examining how the binding energy is influenced by:

Which of the following is not true for both the photon and the neutrino.

Two different nuclei emit alpha particles,the energy released in each of these decays being the same.Which of the following has the highest resulting kinetic energy?

The neutron is radioactive and can beta decay to form a proton.This can occur primarily because:

The atomic number of a given element is equivalent to which of the following?

The isotope 64Zn has a nuclear radius of 4.8 ×10−15 m.Which of the following is the mass number of an isotope for which the nuclear radius is 3.6 ×10−15 m?

A radioactive isotope that emits a gamma quantum will change in what respect?

Which of the following is not a unit of radiation dose?

A particle is fired at a target nucleus in which a reaction that could occur has a negative Q value.Which of the following statements is true?

Calculate the binding energy per nucleon of the tritium nucleus, ,given that the mass of the tritium nucleus is 3.016 05 u.(mp = 1.007 276 u,mn = 1.008 665,and 1 u = 931.5 MeV/c2)

Introduction

Introduction: Part A

Motion in One Dimension

Motion in One Dimension: Part A

Vectors and Two-Dimensional Motion

Vectors and Two-Dimensional Motion: Part A

The Laws of Motion

The Laws of Motion: Part A

Energy

Energy: Part A

Momentum and Collisions

Momentum and Collisions: Part A

Rotational Motion and the Law of Gravity

Rotational Motion and the Law of Gravity: Part A

Rotational Equilibrium and Rotational Dynamics

Rotational Equilibrium and Rotational Dynamics: Part A

Solids and Fluids

Solids and Fluids: Part A

Thermal Physics

Thermal Physics: Part A

Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

The Laws of Thermodynamics Work in Thermodynamic Processes

The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

Vibrations and Waves

Vibrations and Waves: Part A

Sound

Sound: Part A

Electric Forces and Electric Fields

Electric Forces and Electric Fields: Part A

Electrical Energy and Capacitance

Electrical Energy and Capacitance: Part A

Current and Resistance Electric Current

Current and Resistance Electric Current: Part A

Direct-Current Circuits Sources of EMF

Direct-Current Circuits Sources of EMF: Part A

Magnetism Magnets

Magnetism Magnets: Part A

Induced Voltages and Inductance

Induced Voltages and Inductance: Part A

Alternating-Current Circuits and Electromagnetic Waves

Alternating-Current Circuits and Electromagnetic Waves: Part A

Reflection and Refraction of Light

Reflection and Refraction of Light: Part A

Mirrors and Lenses

Mirrors and Lenses: Part A

Wave Optics

Wave Optics: Part A

Optical Instruments

Optical Instruments: Part A

Relativity

Relativity: Part A

Quantum Physics Blackbody Radiation and Plancks Hypothesis

Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

Atomic Physics

Atomic Physics: Part A

Nuclear Physics: Part A

Nuclear Energy and Elementary Particles

Nuclear Energy and Elementary Particles: Part A

Particle Collisions, Mediating Photons, and Quark Structures: Exploring the Fundamentals of Physics

Filters

Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.2 × 10−⁶ Ci and a half-life of 12.3 years? (1 Ci = 3.7 × 10¹⁰ decays/s)

A 1-gram sample of wood is taken from an ancient site.If the Carbon-14 activity of the sample is 19.0% that of present-day organic material,what is the age of the wood? (T_1/2 for ¹⁴C is 5 730 years)

The mass of ¹²C is 12 u where 1 u = 1.660 559 × 10−²⁷ kg.This mass is equal to:

The isotope ⁶⁴Zn has a nuclear radius of 4.8 ×10−¹⁵ m.Which of the following is the mass number of an isotope for which the nuclear radius is 3.6 ×10−¹⁵ m?

Calculate the binding energy per nucleon of the tritium nucleus, ,given that the mass of the tritium nucleus is 3.016 05 u.(m_p = 1.007 276 u,mn = 1.008 665,and 1 u = 931.5 MeV/c²)