Question 1

The missing product from this reaction is __________.   Fr →   N + _____

Accepted Answer

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

Question 2

What is the rate constant (in min-1)for the decay of this radionuclide?

Accepted Answer

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

Question 3

Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238?

Accepted Answer

A) freeze it 
B) heat it 
C) convert it to UF6 
D) oxidize it to the +2 oxidation state 
E) none of the above 
A) freeze it 
B) heat it 
C) convert it to UF6 
D) oxidize it to the +2 oxidation state 
E) none of the above E

Question 4

Radioactive seeds that are implanted into a tumor are coated with __________ to stop alpha and beta ray penetration.

Accepted Answer

The answer of Radioactive seeds that are implanted into a...

Question 5

The first nuclear transmutation resulted in the conversion of nitrogen-14 to __________.

Accepted Answer

The answer of The first nuclear transmutation resulted in the...

Question 6

Which one of the following is not true concerning radon?

Accepted Answer

A) It decays by alpha emission. 
B) It decays to polonium-218, an alpha emitter. 
C) It is chemically active in human lungs. 
D) It has been implicated in lung cancer. 
E) It is generated as uranium decays. 
A) It decays by alpha emission. 
B) It decays to polonium-218, an alpha emitter. 
C) It is chemically active in human lungs. 
D) It has been implicated in lung cancer. 
E) It is generated as uranium decays.

Question 7

The curie is a measure of the

Accepted Answer

A) number of disintegrations per second of a radioactive substance. 
B) total energy absorbed by an object exposed to a radioactive source. 
C) lethal threshold for radiation exposure. 
D) number of alpha particles emitted by exactly one gram of a radioactive substance. 
E) None of the above is correct. 
A) number of disintegrations per second of a radioactive substance. 
B) total energy absorbed by an object exposed to a radioactive source. 
C) lethal threshold for radiation exposure. 
D) number of alpha particles emitted by exactly one gram of a radioactive substance. 
E) None of the above is correct.

Question 8

Which one of the following is a correct representation of a positron?

Accepted Answer

A)    e 
B)    β 
C)    e 
D)    e 
E)    β 
A)    e 
B)    β 
C)    e 
D)    e 
E)    β

Question 9

Stable nuclei with low atomic numbers, up to 20, have a neutron to proton ratio of approximately __________.

Accepted Answer

The answer of Stable nuclei with low atomic numbers, up...

Question 10

The missing product from this reaction is __________.   I →   Te + _____

Accepted Answer

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

Question 11

Which one of the following requires a particle accelerator to occur?

Accepted Answer

A)    Fe →   Co +   e 
B)    Co +   n →   Co 
C)    U +   n →   Np +   e 
D)    Pu +   He →   Cm +   n 
E) none of the above 
A)    Fe →   Co +   e 
B)    Co +   n →   Co 
C)    U +   n →   Np +   e 
D)    Pu +   He →   Cm +   n 
E) none of the above

Question 12

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a carbon-12 nucleus to produce a   Rf nucleus?

Accepted Answer

A) one 
B) three 
C) two 
D) four 
E) zero 
A) one 
B) three 
C) two 
D) four 
E) zero

Question 13

In the nuclear transmutation,   O (p, α)   N, what is the bombarding particle?

Accepted Answer

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

Question 14

In what type of radioactive decay does the atomic number of the product increase by one?

Accepted Answer

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

Question 15

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a   Db nucleus?

Accepted Answer

A) two 
B) three 
C) four 
D) one 
E) zero 
A) two 
B) three 
C) four 
D) one 
E) zero

Question 16

Atoms with the same atomic number and different mass numbers

Accepted Answer

A) do not exist. 
B) are isomers. 
C) are isotopes. 
D) are allotropes 
E) are resonance structures. 
A) do not exist. 
B) are isomers. 
C) are isotopes. 
D) are allotropes 
E) are resonance structures.

Question 17

What happens in the nucleus of an atom that undergoes positron emission?

Accepted Answer

A proton is converte

Question 18

Gamma radiation only changes the atomic number but not the mass number of a nucleus.

Accepted Answer

A) True 
 B)False

Question 19

What is the typical percent of uranium-235 in the enriched UO2 pellets used in nuclear reactors?

Accepted Answer

A) 0.7 
B) 1 
C) 3 
D) 10 
E) 14 
A) 0.7 
B) 1 
C) 3 
D) 10 
E) 14

Question 20

Which one of the following is used as a radiotracer to study blood?

Accepted Answer

A) iron-59 
B) technetium-99 
C) sodium-23 
D) iodine-131 
E) phosphorus-32 
A) iron-59 
B) technetium-99 
C) sodium-23 
D) iodine-131 
E) phosphorus-32

Exam 21: Nuclear Chemistry

The missing product from this reaction is __________. Fr → N + _____

What is the rate constant (in min-1)for the decay of this radionuclide?

Which one of the following can be done to shorten the half-life of the radioactive decay of uranium-238?

Radioactive seeds that are implanted into a tumor are coated with __________ to stop alpha and beta ray penetration.

The first nuclear transmutation resulted in the conversion of nitrogen-14 to __________.

Which one of the following is not true concerning radon?

The curie is a measure of the

Which one of the following is a correct representation of a positron?

Stable nuclei with low atomic numbers, up to 20, have a neutron to proton ratio of approximately __________.

The missing product from this reaction is __________. I → Te + _____

Which one of the following requires a particle accelerator to occur?

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a carbon-12 nucleus to produce a Rf nucleus?

In the nuclear transmutation, O (p, α) N, what is the bombarding particle?

In what type of radioactive decay does the atomic number of the product increase by one?

How many neutrons are emitted when a californium-249 nucleus (Z=98)is bombarded with a nitrogen-15 nucleus to produce a Db nucleus?

Atoms with the same atomic number and different mass numbers

What happens in the nucleus of an atom that undergoes positron emission?

Gamma radiation only changes the atomic number but not the mass number of a nucleus.

What is the typical percent of uranium-235 in the enriched UO2 pellets used in nuclear reactors?

Which one of the following is used as a radiotracer to study blood?

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

Filters

The missing product from this reaction is ______. Fr → N + _

What is the rate constant (in min^-1)for the decay of this radionuclide?

The missing product from this reaction is ______. I → Te + _

What is the typical percent of uranium-235 in the enriched UO₂ pellets used in nuclear reactors?