Question 1

Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and __________.

Accepted Answer

A) zirconium-98. 
B) krypton-101. 
C) krypton-103. 
D) strontium-99. 
E) zirconium-99. 
A) zirconium-98. 
B) krypton-101. 
C) krypton-103. 
D) strontium-99. 
E) zirconium-99.

Question 2

If we start with 1.000 g of strontium-90, 0.908 g will remain after 4.00 yr. This means that the half-life of strontium-90 is __________ yr.

Accepted Answer

A) 3.05 
B) 4.40 
C) 28.8 
D) 3.63 
E) 41.6 
A) 3.05 
B) 4.40 
C) 28.8 
D) 3.63 
E) 41.6

Question 3

What is emitted in the nuclear transmutation,   Al(n, ?)   Na?

Accepted Answer

A) an alpha particle 
B) a beta particle 
C) a neutron 
D) a proton 
E) a gamma photon 
A) an alpha particle 
B) a beta particle 
C) a neutron 
D) a proton 
E) a gamma photon

Question 4

131I has a half-life of 8.04 days. Assuming you start with a 3.53 mg sample of 131I, how many mg will remain after 13.0 days?

Accepted Answer

A) 0.326 
B) 0.268 
C) 0.422 
D) 2.30 
E) 1.15 
A) 0.326 
B) 0.268 
C) 0.422 
D) 2.30 
E) 1.15

Question 5

What is the half-life (in min)of this radionuclide?

Accepted Answer

A) 0.024 
B) 0.022 
C) 32 
D) 0.032 
E) 45 
A) 0.024 
B) 0.022 
C) 32 
D) 0.032 
E) 45

Question 6

What type of reaction is known as a thermonuclear reaction?

Accepted Answer

A) fission 
B) fusion 
C) transmutation 
D) beta emission 
E) neutron emission 
A) fission 
B) fusion 
C) transmutation 
D) beta emission 
E) neutron emission

Question 7

When an isotope undergoes electron capture, what happens to the captured electron?

Accepted Answer

It combines with a p

Question 8

The missing product from this reaction is __________.   Np →   Pa + _____

Accepted Answer

A)    He 
B)    e 
C)    n 
D)    e 
E)    γ 
A)    He 
B)    e 
C)    n 
D)    e 
E)    γ

Question 9

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

Accepted Answer

A) alpha 
B) beta 
C) positron emission 
D) electron capture 
E) gamma 
A) alpha 
B) beta 
C) positron emission 
D) electron capture 
E) gamma

Question 10

This reaction is an example of __________.   Po →   Pb + _____

Accepted Answer

A) alpha decay 
B) beta emission 
C) gamma emission 
D) positron emission 
E) electron capture 
A) alpha decay 
B) beta emission 
C) gamma emission 
D) positron emission 
E) electron capture

Question 11

Bombardment of uranium-238 with a deuteron (hydrogen-2)generates neptunium-237 and __________ neutrons.

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 5 
A) 1 
B) 2 
C) 3 
D) 4 
E) 5

Question 12

Which one of the following is true?

Accepted Answer

A) Some spontaneous nuclear reactions are exothermic. 
B) Some spontaneous nuclear reactions are endothermic. 
C) All spontaneous nuclear reactions are exothermic. 
D) There is no relationship between exothermicity and spontaneity in nuclear reactions. 
E) All spontaneous nuclear reactions are endothermic. 
A) Some spontaneous nuclear reactions are exothermic. 
B) Some spontaneous nuclear reactions are endothermic. 
C) All spontaneous nuclear reactions are exothermic. 
D) There is no relationship between exothermicity and spontaneity in nuclear reactions. 
E) All spontaneous nuclear reactions are endothermic.

Question 13

What happens to the mass number and the atomic number of an element when it emits gamma radiation?

Accepted Answer

A) The mass number remains unchanged while the atomic number decreases by one. 
B) The mass number decreases by four and the atomic number decreases by two. 
C) The mass number increases by four and the atomic number increases by two. 
D) The mass number remains unchanged while the atomic number increases by one. 
E) The mass number and atomic numbers remain unchanged. 
A) The mass number remains unchanged while the atomic number decreases by one. 
B) The mass number decreases by four and the atomic number decreases by two. 
C) The mass number increases by four and the atomic number increases by two. 
D) The mass number remains unchanged while the atomic number increases by one. 
E) The mass number and atomic numbers remain unchanged.

Question 14

Potassium-40 decays to argon-40 with a half-life of 1.27 × 109 yr. The age of a mineral sample that has a mass ratio of 40Ar to 40K of 0.712 is __________ yr.

Accepted Answer

A) 1.78 × 109 
B) 1.11 × 109 
C) 1.61 × 109 
D) 6.83 × 108 
E) 9.85 × 108 
A) 1.78 × 109 
B) 1.11 × 109 
C) 1.61 × 109 
D) 6.83 × 108 
E) 9.85 × 108

Question 15

Carbon-11 decays by positron emission:   C →   B +   e The decay occurs with a release of 2.87 × 1011 J per mole of carbon-11. When 4.00 g of carbon-11 undergoes this radioactive decay, __________ g of mass is converted to energy.

Accepted Answer

A) 1.16 × 10-3 
B) 3.48 × 105 
C) 1.16 × 10-6 
D) 8.62 × 102 
E) 1.28 × 10-2 
A) 1.16 × 10-3 
B) 3.48 × 105 
C) 1.16 × 10-6 
D) 8.62 × 102 
E) 1.28 × 10-2

Question 16

__________ discovered radioactivity.

Accepted Answer

The answer of __________ discovered radioactivity....

Question 17

The half-life of a radionuclide

Accepted Answer

A) is constant. 
B) gets shorter with passing time. 
C) gets longer with passing time. 
D) gets shorter with increased temperature. 
E) gets longer with increased temperature. 
A) is constant. 
B) gets shorter with passing time. 
C) gets longer with passing time. 
D) gets shorter with increased temperature. 
E) gets longer with increased temperature.

Question 18

What drives the turbine in a nuclear power plant?

Accepted Answer

A) the moderator 
B) steam 
C) the control rods 
D) the primary coolant 
E) UF6 gas 
A) the moderator 
B) steam 
C) the control rods 
D) the primary coolant 
E) UF6 gas

Question 19

The mass of a proton is 1.673 × 10-24 g. The mass of a neutron is 1.675 × 10-24 g. The mass of the nucleus of an 56Fe atom is 9.289 × 10-23 g. What is the nuclear binding energy (in J)for a 56Fe nucleus? (c = 3.00 × 108 m/s)

Accepted Answer

A) 2.57 × 10-16 
B) 7.72 × 10-8 
C) 8.36 × 10-9 
D) 7.65 × 10-11 
E) 6.07 × 106 
A) 2.57 × 10-16 
B) 7.72 × 10-8 
C) 8.36 × 10-9 
D) 7.65 × 10-11 
E) 6.07 × 106

Question 20

In the nuclear transmutation represented by   Pu(   He,   n)?, what is the product?

Accepted Answer

A) uranium-242 
B) curium-245 
C) curium-242 
D) uranium-245 
E) uranium-243 
A) uranium-242 
B) curium-245 
C) curium-242 
D) uranium-245 
E) uranium-243

Exam 21: Nuclear Chemistry

Bombardment of uranium-235 with a neutron generates tellurium-135, 3 neutrons, and __________.

If we start with 1.000 g of strontium-90, 0.908 g will remain after 4.00 yr. This means that the half-life of strontium-90 is __________ yr.

What is emitted in the nuclear transmutation, Al(n, ?) Na?

131I has a half-life of 8.04 days. Assuming you start with a 3.53 mg sample of 131I, how many mg will remain after 13.0 days?

What is the half-life (in min)of this radionuclide?

What type of reaction is known as a thermonuclear reaction?

When an isotope undergoes electron capture, what happens to the captured electron?

The missing product from this reaction is __________. Np → Pa + _____

Which type of radioactive decay results in no change in mass number and atomic number for the starting nucleus?

This reaction is an example of __________. Po → Pb + _____

Bombardment of uranium-238 with a deuteron (hydrogen-2)generates neptunium-237 and __________ neutrons.

Which one of the following is true?

What happens to the mass number and the atomic number of an element when it emits gamma radiation?

Potassium-40 decays to argon-40 with a half-life of 1.27 × 109 yr. The age of a mineral sample that has a mass ratio of 40Ar to 40K of 0.712 is __________ yr.

Carbon-11 decays by positron emission: C → B + e The decay occurs with a release of 2.87 × 1011 J per mole of carbon-11. When 4.00 g of carbon-11 undergoes this radioactive decay, __________ g of mass is converted to energy.

__________ discovered radioactivity.

The half-life of a radionuclide

What drives the turbine in a nuclear power plant?

The mass of a proton is 1.673 × 10-24 g. The mass of a neutron is 1.675 × 10-24 g. The mass of the nucleus of an 56Fe atom is 9.289 × 10-23 g. What is the nuclear binding energy (in J)for a 56Fe nucleus? (c = 3.00 × 108 m/s)

In the nuclear transmutation represented by Pu( He, n)?, what is the product?

Introduction: Matter and Measurement

Atoms, Molecules, and Ions

Stoichiometry: Calculations With Chemical Formulas and Equations

Aqueous Reactions and Solution Stoichiometry

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Molecular Geometry and Bonding Theories

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

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¹³¹I has a half-life of 8.04 days. Assuming you start with a 3.53 mg sample of ¹³¹I, how many mg will remain after 13.0 days?

The missing product from this reaction is ______. Np → Pa + _

This reaction is an example of ______. Po → Pb + _

Potassium-40 decays to argon-40 with a half-life of 1.27 × 10⁹ yr. The age of a mineral sample that has a mass ratio of ⁴⁰Ar to ⁴⁰K of 0.712 is __________ yr.

Carbon-11 decays by positron emission: C → B + e The decay occurs with a release of 2.87 × 10¹¹ J per mole of carbon-11. When 4.00 g of carbon-11 undergoes this radioactive decay, __________ g of mass is converted to energy.

The mass of a proton is 1.673 × 10^-24 g. The mass of a neutron is 1.675 × 10^-24 g. The mass of the nucleus of an ⁵⁶Fe atom is 9.289 × 10^-23 g. What is the nuclear binding energy (in J)for a ⁵⁶Fe nucleus? (c = 3.00 × 10⁸ m/s)