A pure sample of 226Ra contains 3.0 × 1014 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?

A) 13 × 1010 decays/yr B) 9.4 × 1010 decays/yr C) 6.7 × 109 decays/yr D) 8.7 × 1010decays/yr A) 13 × 1010 decays/yr B) 9.4 × 1010 decays/yr C) 6.7 × 109 decays/yr D) 8.7 × 1010decays/yr

What particle is emitted when 236Pa decays to 236U? (The atomic numbers of Pa and U are,respectively,91 and 92. )

A) beta (positron) B) alpha C) gamma quantum D) beta (electron) A) beta (positron) B) alpha C) gamma quantum D) beta (electron)

Neglecting recoil of the gold nucleus,how much kinetic energy must an alpha particle (charge = 2 × 1.6 × 10−19 C)have to approach to within 1.95 × 10−14 m of a gold nucleus (charge = 79 × 1.6 × 10−19 C)? (ke = 8.99 × 109 N⋅m2/C2 and 1 MeV = 1.6 × 10−13 J)

A) 14.6 MeV B) 11.7 MeV C) 18.2 MeV D) 22.7 MeV A) 14.6 MeV B) 11.7 MeV C) 18.2 MeV D) 22.7 MeV

What particle is emitted when 20Na decays to 20Ne? (The atomic numbers of Na and Ne are,respectively,11 and 10. )

A) beta (positron) B) gamma quantum C) alpha D) beta (electron) A) beta (positron) B) gamma quantum C) alpha D) beta (electron)

A pure sample of 226Ra contains 3.0 × 1014 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the decay rate of this sample? (1 Ci = 3.7 × 1010 decays/s)

A) 2.7 × 10−12 Ci B) 11 × 10−8 Ci C) 3.4 × 10−10 Ci D) 7.4 × 10−8 Ci A) 2.7 × 10−12 Ci B) 11 × 10−8 Ci C) 3.4 × 10−10 Ci D) 7.4 × 10−8 Ci

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of 99Tc nuclei necessary to produce a sample of activity 18 µCi.(1 Ci = 3.7 × 1010 decays/second)

A) 1.2 × 109 B) 3.4 × 1011 C) 8.0 × 108 D) 2.1 × 1010 A) 1.2 × 109 B) 3.4 × 1011 C) 8.0 × 108 D) 2.1 × 1010

Exam 30: Nuclear Energy and Elementary Particles: Part A

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A pure sample of ²²⁶Ra contains 3.0 × 10¹⁴ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the activity of this sample?

(Multiple Choice)

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Question 21

An ancient building was known to have been built 4000 years ago.Approximately what proportion of Carbon-14 atoms are still in the building's wooden framing compared to the number which were present at the time of its construction? (half life of ¹⁴C = 5730 years)

(Multiple Choice)

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Question 22

What particle is emitted when ²³⁶Pa decays to ²³⁶U? (The atomic numbers of Pa and U are,respectively,91 and 92. )

(Multiple Choice)

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Question 23

One of the nuclear reactions that occurs is )What does the X represent in this equation?

(Multiple Choice)

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Question 24

If a fossil bone is found to contain 1/16th as much Carbon-14 as the bone of a living animal,what is the approximate age of the fossil? (half-life of ¹⁴C = 5730 years)

(Multiple Choice)

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Question 25

Sample #1 is made from an isotope with decay constant And sample #2 is made from an isotope with decay constant ,where )Which of the following statements must be true?

(Multiple Choice)

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Question 26

Tritium has a half-life of 12.3 years.How many years will elapse when the radioactivity of a tritium sample diminishes to 30% of its original value?

(Multiple Choice)

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Question 27

Neglecting recoil of the gold nucleus,how much kinetic energy must an alpha particle (charge = 2 × 1.6 × 10−¹⁹ C)have to approach to within 1.95 × 10−¹⁴ m of a gold nucleus (charge = 79 × 1.6 × 10−¹⁹ C)? (k_e = 8.99 × 10⁹ N⋅m²/C² and 1 MeV = 1.6 × 10−¹³ J)

(Multiple Choice)

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Question 28

Over the course of 6 hours,15% of a radioactive material decays.What is its half-life?

(Multiple Choice)

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Question 29

The energy released from a nuclear reaction is equal to:

(Multiple Choice)

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Question 30

Tritium (³H)has a half-life of 12.3 years and releases 0.0186 MeV energy per decay.What is the activity of a 9.0-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 = 3.01605 u)

(Multiple Choice)

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Question 31

What particle is emitted when ²⁰Na decays to ²⁰Ne? (The atomic numbers of Na and Ne are,respectively,11 and 10. )

(Multiple Choice)

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Question 32

A pure sample of ²²⁶Ra contains 3.0 × 10¹⁴ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the decay rate of this sample? (1 Ci = 3.7 × 10¹⁰ decays/s)

(Multiple Choice)

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Question 33

Tritium has a half-life of 12.3 years.What proportion of its original radioactivity will a sample have after 6 years?

(Multiple Choice)

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Question 34

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 6.8 ×10−¹⁵ m?

(Multiple Choice)

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Question 35

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of ⁹⁹Tc nuclei necessary to produce a sample of activity 18 µCi.(1 Ci = 3.7 × 10¹⁰ decays/second)

(Multiple Choice)

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Question 36

About what fraction of the initial activity of a radioactive source remains after 10 half-lives?

(Multiple Choice)

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Question 37

Showing 21 - 37 of 37

Exam 30: Nuclear Energy and Elementary Particles: Part A

A pure sample of 226Ra contains 3.0 × 1014 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the activity of this sample?

An ancient building was known to have been built 4000 years ago.Approximately what proportion of Carbon-14 atoms are still in the building's wooden framing compared to the number which were present at the time of its construction? (half life of 14C = 5730 years)

What particle is emitted when 236Pa decays to 236U? (The atomic numbers of Pa and U are,respectively,91 and 92. )

One of the nuclear reactions that occurs is )What does the X represent in this equation?

If a fossil bone is found to contain 1/16th as much Carbon-14 as the bone of a living animal,what is the approximate age of the fossil? (half-life of 14C = 5730 years)

Sample #1 is made from an isotope with decay constant And sample #2 is made from an isotope with decay constant ,where )Which of the following statements must be true?

Tritium has a half-life of 12.3 years.How many years will elapse when the radioactivity of a tritium sample diminishes to 30% of its original value?

Neglecting recoil of the gold nucleus,how much kinetic energy must an alpha particle (charge = 2 × 1.6 × 10−19 C)have to approach to within 1.95 × 10−14 m of a gold nucleus (charge = 79 × 1.6 × 10−19 C)? (ke = 8.99 × 109 N⋅m2/C2 and 1 MeV = 1.6 × 10−13 J)

Over the course of 6 hours,15% of a radioactive material decays.What is its half-life?

The energy released from a nuclear reaction is equal to:

Tritium (3H)has a half-life of 12.3 years and releases 0.0186 MeV energy per decay.What is the activity of a 9.0-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 = 3.01605 u)

What particle is emitted when 20Na decays to 20Ne? (The atomic numbers of Na and Ne are,respectively,11 and 10. )

A pure sample of 226Ra contains 3.0 × 1014 atoms of the isotope.If the half-life of 226Ra = 1.6 × 103 years,what is the decay rate of this sample? (1 Ci = 3.7 × 1010 decays/s)

Tritium has a half-life of 12.3 years.What proportion of its original radioactivity will a sample have after 6 years?

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 6.8 ×10−15 m?

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of 99Tc nuclei necessary to produce a sample of activity 18 µCi.(1 Ci = 3.7 × 1010 decays/second)

About what fraction of the initial activity of a radioactive source remains after 10 half-lives?

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

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Energy: Part A

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Rotational Motion and the Law of Gravity: Part A

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Rotational Equilibrium and Rotational Dynamics: Part A

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Energy in Thermal Processes Heat and Internal Energy: Part A

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Magnetism Magnets: Part A

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Alternating-Current Circuits and Electromagnetic Waves: Part A

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Quantum Physics Blackbody Radiation and Plancks Hypothesis: Part A

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Nuclear Energy and Elementary Particles

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

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A pure sample of ²²⁶Ra contains 3.0 × 10¹⁴ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the activity of this sample?

An ancient building was known to have been built 4000 years ago.Approximately what proportion of Carbon-14 atoms are still in the building's wooden framing compared to the number which were present at the time of its construction? (half life of ¹⁴C = 5730 years)

What particle is emitted when ²³⁶Pa decays to ²³⁶U? (The atomic numbers of Pa and U are,respectively,91 and 92. )

If a fossil bone is found to contain 1/16th as much Carbon-14 as the bone of a living animal,what is the approximate age of the fossil? (half-life of ¹⁴C = 5730 years)

Neglecting recoil of the gold nucleus,how much kinetic energy must an alpha particle (charge = 2 × 1.6 × 10−¹⁹ C)have to approach to within 1.95 × 10−¹⁴ m of a gold nucleus (charge = 79 × 1.6 × 10−¹⁹ C)? (k_e = 8.99 × 10⁹ N⋅m²/C² and 1 MeV = 1.6 × 10−¹³ J)

Tritium (³H)has a half-life of 12.3 years and releases 0.0186 MeV energy per decay.What is the activity of a 9.0-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 = 3.01605 u)

What particle is emitted when ²⁰Na decays to ²⁰Ne? (The atomic numbers of Na and Ne are,respectively,11 and 10. )

A pure sample of ²²⁶Ra contains 3.0 × 10¹⁴ atoms of the isotope.If the half-life of ²²⁶Ra = 1.6 × 10³ years,what is the decay rate of this sample? (1 Ci = 3.7 × 10¹⁰ decays/s)

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 6.8 ×10−¹⁵ m?

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of ⁹⁹Tc nuclei necessary to produce a sample of activity 18 µCi.(1 Ci = 3.7 × 10¹⁰ decays/second)