Question 1

In radioactive dating, the ratio of carbon-12 to carbon-14 is related to the time of death of the animal or plant under investigation.

Accepted Answer

A) True 
 B)False

Question 2

Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage of a strontium-90 sample remains after 175.0 yr?

Accepted Answer

A) 84.8 
B) 1.48 
C) 0.230 
D) 16.5 
E) 6.08 
A) 84.8 
B) 1.48 
C) 0.230 
D) 16.5 
E) 6.08

Question 3

The basis for the carbon-14 dating method is that ________.

Accepted Answer

A) the amount of carbon-14 in all objects is the same 
B) carbon-14 is very unstable and is readily lost from the atmosphere 
C) the ratio of carbon-14 to carbon-12 in the atmosphere is a constant 
D) living tissue will not absorb carbon-14 but will absorb carbon-12 
E) All of the above are correct. 
A) the amount of carbon-14 in all objects is the same 
B) carbon-14 is very unstable and is readily lost from the atmosphere 
C) the ratio of carbon-14 to carbon-12 in the atmosphere is a constant 
D) living tissue will not absorb carbon-14 but will absorb carbon-12 
E) All of the above are correct.

Question 4

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in amu)of a 57Ni nucleus? (The mass of a nickel-60 nucleus is 59.9308 amu.)

Accepted Answer

A) 0.5155 amu 
B) 28.76 amu 
C) -0.4932 amu 
D) 0.5141 amu 
E) 1.031 amu 
A) 0.5155 amu 
B) 28.76 amu 
C) -0.4932 amu 
D) 0.5141 amu 
E) 1.031 amu

Question 5

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 6

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 7

The missing product in this reaction would be found in which group of the periodic table?   Na →   e + _____

Accepted Answer

A) 1A 
B) 2A 
C) 3A 
D) 8A 
E) 7A 
A) 1A 
B) 2A 
C) 3A 
D) 8A 
E) 7A

Question 8

Atoms containing radioactive nuclei are called ________.

Accepted Answer

A) radionuclides 
B) radioisotopes 
C) nucleons 
D) nuclides 
E) radioisophores 
A) radionuclides 
B) radioisotopes 
C) nucleons 
D) nuclides 
E) radioisophores

Question 9

Carbon-11 decays by ________.

Accepted Answer

A) alpha emission 
B) beta emission 
C) positron emission 
D) photon emission 
E) neutron capture 
A) alpha emission 
B) beta emission 
C) positron emission 
D) photon emission 
E) neutron capture

Question 10

The largest number of stable nuclei have an ________ number of protons and an ________ number of neutrons.

Accepted Answer

A) even, even 
B) odd, odd 
C) even, odd 
D) odd, even 
E) even, equal 
A) even, even 
B) odd, odd 
C) even, odd 
D) odd, even 
E) even, equal

Question 11

What is the missing product from this reaction?   P →   S + _____

Accepted Answer

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

Question 12

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 59Fe atom is 9.787 × 10-23 g. What is the nuclear binding energy (in J)for a 59Fe nucleus? (c = 3.00 × 108 m/s)

Accepted Answer

A) 8.13 × 10-11 J 
B) 2.71 × 10-19 J 
C) 8.13 × 10-8 J 
D) 4.00 × 10-9 J 
E) -9.74 × 10-10 J 
A) 8.13 × 10-11 J 
B) 2.71 × 10-19 J 
C) 8.13 × 10-8 J 
D) 4.00 × 10-9 J 
E) -9.74 × 10-10 J

Question 13

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 14

The carbon-14 dating method can be used to determine the age of a ________.

Accepted Answer

A) flint arrowhead 
B) papyrus scroll 
C) stone axe head 
D) clay pot 
E) rock 
A) flint arrowhead 
B) papyrus scroll 
C) stone axe head 
D) clay pot 
E) rock

Question 15

The missing product from this reaction is ________.   Al +   n →   Si + _____

Accepted Answer

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

Question 16

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

Question 17

This reaction is an example of ________.   Kr →   Rb + _____

Accepted Answer

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

Question 18

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 19

What was the purpose of the Manhattan project?

Accepted Answer

to build a

Question 20

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

Exam 21: Nuclear Chemistry

In radioactive dating, the ratio of carbon-12 to carbon-14 is related to the time of death of the animal or plant under investigation.

Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The half-life of strontium-90 is 28.8 yr. What percentage of a strontium-90 sample remains after 175.0 yr?

The basis for the carbon-14 dating method is that ________.

The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in amu)of a 57Ni nucleus? (The mass of a nickel-60 nucleus is 59.9308 amu.)

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

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

The missing product in this reaction would be found in which group of the periodic table? Na → e + _____

Atoms containing radioactive nuclei are called ________.

Carbon-11 decays by ________.

The largest number of stable nuclei have an ________ number of protons and an ________ number of neutrons.

What is the missing product from this reaction? P → S + _____

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 59Fe atom is 9.787 × 10-23 g. What is the nuclear binding energy (in J)for a 59Fe nucleus? (c = 3.00 × 108 m/s)

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

The carbon-14 dating method can be used to determine the age of a ________.

The missing product from this reaction is ________. Al + n → Si + _____

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

This reaction is an example of ________. Kr → Rb + _____

The half-life of a radionuclide ________.

What was the purpose of the Manhattan project?

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

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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The mass of a proton is 1.00728 amu and that of a neutron is 1.00867 amu. What is the mass defect (in amu)of a ⁵⁷Ni nucleus? (The mass of a nickel-60 nucleus is 59.9308 amu.)

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

The largest number of stable nuclei have an number of protons and an number of neutrons.

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 ⁵⁹Fe atom is 9.787 × 10^-23 g. What is the nuclear binding energy (in J)for a ⁵⁹Fe nucleus? (c = 3.00 × 10⁸ m/s)

The missing product from this reaction is ____. Al + n → Si + _

This reaction is an example of ____. Kr → Rb + _