A pure sample of 226Ra contains 3.0 × 1015 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?

A) 1.9E+12 decays/yr B) 1.3E+12 decays/yr C) 4.1E+4 decays/yr D) 4.8E+18 decays/yr E) 8.1E+8 decays/yr A) 1.9E+12 decays/yr B) 1.3E+12 decays/yr C) 4.1E+4 decays/yr D) 4.8E+18 decays/yr E) 8.1E+8 decays/yr

The mass of 238U is not quite an integer multiple of 1H mass.This is primarily because:

A) the proton and neutron have different masses. B) there are several isotopes of uranium. C) of the binding energy of uranium. D) uranium is radioactive. A) the proton and neutron have different masses. B) there are several isotopes of uranium. C) of the binding energy of uranium. D) uranium is radioactive.

A) 1 B) 106 C) 2.7 × 10-11 D) 3.7 × 1010 A) 1 B) 106 C) 2.7 × 10-11 D) 3.7 × 1010

Exam 29: Nuclear Physics

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A radioactive material initially is observed to have an activity of 1600 decays/sec.If six hours later it is observed to have an activity of 400 decays/sec,what is its half-life?

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Over the course of 6 hours,49% of a radioactive material decays.What is its half-life?

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What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c²)

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The alpha radiation first classified by Rutherford was in fact which of the following?

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Question 4

The atomic mass number of a nucleus is equivalent to which of the following numbers?

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Question 5

Approximately how many half-life periods must elapse if the activity of a radioactive isotope sample is to be reduced to 0.004 of the original value?

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Question 6

The isotope ²³⁸U,which starts one of the natural radioactive series,decays first by alpha decay followed by two negative beta decays.At this point,what is the resulting isotope?

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Question 7

What is the binding energy per nucleon of ¹⁹⁷Au (atomic number = 79)? (The following information regarding atomic masses will be needed: ¹⁹⁷Au,196.966 543 u;hydrogen,1.007 825 u;neutron,1.008 665 u;also 1 u = 931.5 MeV/c²)

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Question 8

A pure sample of ²²⁶Ra contains 3.0 × 10¹⁵ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the activity of this sample?

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Question 9

The molecular mass for chlorine is not an integer multiple of the molecular mass of hydrogen but is about 35.5 times the molecular mass of hydrogen.This is primarily because:

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Question 10

The beta radiation first classified by Rutherford was in fact which of the following?

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Question 11

The gamma radiation first classified by Rutherford was in fact which of the following?

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Question 12

The mass of ²³⁸U is not quite an integer multiple of ¹H mass.This is primarily because:

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Question 13

What is the Q-value for the reaction where the products are 0.006 u less than the reactants? (1 u = 931.5 MeV/c²)

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Question 14

Tritium (³H)has a half-life of 12.3 years and releases 0.018 6 MeV energy per decay.What is the rate at which energy is released for a 1.5-gram sample of tritium? (N_A = 6.02 × 10²³ mol^-1,1 year = 3.16 × 10⁷ s,1 MeV = 1.6 × 10^-13 J,and m_t = 3.016 05 u)

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Question 15

The nucleus of an atom is made up of which of the following?

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Question 16

Chromium-55 (54.940 8 u)emits an electron leaving a daughter nucleus of manganese-55 (54.938 0 u).How much energy is released in this reaction? (1 u = 931.5 MeV/c²)

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Question 17

Tritium has a half-life of 12.3 years.What proportion of its original radioactivity will a sample have after 5 years?

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Question 18

The beta emission process results in the daughter nucleus differing in what manner from the parent?

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Question 19

1 Bq = ________ Ci?

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Question 20

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Exam 29: Nuclear Physics

A radioactive material initially is observed to have an activity of 1600 decays/sec.If six hours later it is observed to have an activity of 400 decays/sec,what is its half-life?

Over the course of 6 hours,49% of a radioactive material decays.What is its half-life?

What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c2)

The alpha radiation first classified by Rutherford was in fact which of the following?

The atomic mass number of a nucleus is equivalent to which of the following numbers?

Approximately how many half-life periods must elapse if the activity of a radioactive isotope sample is to be reduced to 0.004 of the original value?

The isotope 238U,which starts one of the natural radioactive series,decays first by alpha decay followed by two negative beta decays.At this point,what is the resulting isotope?

What is the binding energy per nucleon of 197Au (atomic number = 79)? (The following information regarding atomic masses will be needed: 197Au,196.966 543 u;hydrogen,1.007 825 u;neutron,1.008 665 u;also 1 u = 931.5 MeV/c2)

A pure sample of 226Ra contains 3.0 × 1015 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?

The molecular mass for chlorine is not an integer multiple of the molecular mass of hydrogen but is about 35.5 times the molecular mass of hydrogen.This is primarily because:

The beta radiation first classified by Rutherford was in fact which of the following?

The gamma radiation first classified by Rutherford was in fact which of the following?

The mass of 238U is not quite an integer multiple of 1H mass.This is primarily because:

What is the Q-value for the reaction where the products are 0.006 u less than the reactants? (1 u = 931.5 MeV/c2)

Tritium (3H)has a half-life of 12.3 years and releases 0.018 6 MeV energy per decay.What is the rate at which energy is released for a 1.5-gram sample of tritium? (NA = 6.02 × 1023 mol-1,1 year = 3.16 × 107 s,1 MeV = 1.6 × 10-13 J,and mt = 3.016 05 u)

The nucleus of an atom is made up of which of the following?

Chromium-55 (54.940 8 u)emits an electron leaving a daughter nucleus of manganese-55 (54.938 0 u).How much energy is released in this reaction? (1 u = 931.5 MeV/c2)

Tritium has a half-life of 12.3 years.What proportion of its original radioactivity will a sample have after 5 years?

The beta emission process results in the daughter nucleus differing in what manner from the parent?

1 Bq = ________ Ci?

Introduction

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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

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Solids and Fluids: Part A

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Energy in Thermal Processes Heat and Internal Energy

Energy in Thermal Processes Heat and Internal Energy: Part A

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The Laws of Thermodynamics Work in Thermodynamic Processes: Part A

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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

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Magnetism Magnets: Part A

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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

What energy must be added or given off in a reaction where two hydrogen atoms and two neutrons are combined to form a helium atom? (Atomic masses for each: hydrogen,1.007 825 u;neutron,1.008 665 u;helium,4.002 602 u;also,1 u = 931.5 MeV/c²)

The isotope ²³⁸U,which starts one of the natural radioactive series,decays first by alpha decay followed by two negative beta decays.At this point,what is the resulting isotope?

What is the binding energy per nucleon of ¹⁹⁷Au (atomic number = 79)? (The following information regarding atomic masses will be needed: ¹⁹⁷Au,196.966 543 u;hydrogen,1.007 825 u;neutron,1.008 665 u;also 1 u = 931.5 MeV/c²)

A pure sample of ²²⁶Ra contains 3.0 × 10¹⁵ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the activity of this sample?

The mass of ²³⁸U is not quite an integer multiple of ¹H mass.This is primarily because:

What is the Q-value for the reaction where the products are 0.006 u less than the reactants? (1 u = 931.5 MeV/c²)

Tritium (³H)has a half-life of 12.3 years and releases 0.018 6 MeV energy per decay.What is the rate at which energy is released for a 1.5-gram sample of tritium? (N_A = 6.02 × 10²³ mol^-1,1 year = 3.16 × 10⁷ s,1 MeV = 1.6 × 10^-13 J,and m_t = 3.016 05 u)

Chromium-55 (54.940 8 u)emits an electron leaving a daughter nucleus of manganese-55 (54.938 0 u).How much energy is released in this reaction? (1 u = 931.5 MeV/c²)