Question 1

This reaction is an example of __________.   P →   Si + _____

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 2

When ionizing radiation enters the body, what is the predominant free radical produced?

Accepted Answer

A) H 
B) H3O 
C) protein 
D) OH 
E) H2O 
A) H 
B) H3O 
C) protein 
D) OH 
E) H2O

Question 3

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

Accepted Answer

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

Question 4

The half-life of carbon-11 is 20.3 minutes. How much of a 100.0 mg sample remains after 1.50 hours?

Accepted Answer

A) 8.48 mg 
B) 4.63 mg 
C) 12.9 mg 
D) 22.6 mg 
E) 7.70 mg 
A) 8.48 mg 
B) 4.63 mg 
C) 12.9 mg 
D) 22.6 mg 
E) 7.70 mg

Question 5

The half-life of 223Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?

Accepted Answer

A) 0.219 mg 
B) 21.9 mg 
C) .0302 mg 
D) 43.8 mg 
E) 6.04 mg 
A) 0.219 mg 
B) 21.9 mg 
C) .0302 mg 
D) 43.8 mg 
E) 6.04 mg

Question 6

The decay of a radionuclide with a half-life of 2.3 × 105 years has a rate constant (in yr-1)equal to __________.

Accepted Answer

A) 3.3 × 105 
B) 3.0 × 10-6 
C) 6.0 × 10-6 
D) 2.8 × 103 
E) 5.9 × 10-8 
A) 3.3 × 105 
B) 3.0 × 10-6 
C) 6.0 × 10-6 
D) 2.8 × 103 
E) 5.9 × 10-8

Question 7

The reaction shown below is responsible for creating 14C in the atmosphere. What is the bombarding particle?   N + _____ →   C +   H

Accepted Answer

A) alpha particle 
B) electron 
C) neutron 
D) positron 
E) proton 
A) alpha particle 
B) electron 
C) neutron 
D) positron 
E) proton

Question 8

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   Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)

Accepted Answer

A) 27.7830 
B) 0.5489 
C) 0.5405 
D) 0.0662 
E) 0.4827 
A) 27.7830 
B) 0.5489 
C) 0.5405 
D) 0.0662 
E) 0.4827

Question 9

The half-life for beta decay of strontium-90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium-90. How many years would pass before the strontium-90 concentration would drop to 1.0 ppm?

Accepted Answer

A) 92.3 
B) 0.112 
C) 186 
D) 96.9 
E) 131 
A) 92.3 
B) 0.112 
C) 186 
D) 96.9 
E) 131

Question 10

The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25 mg sample of cesium 137 to 8.7 mg?

Accepted Answer

A) 46 
B) 32 
C) 3.2 
D) 50 
E) 52 
A) 46 
B) 32 
C) 3.2 
D) 50 
E) 52

Question 11

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 12

In balancing the nuclear reaction   C → E +   e, the identity of element E is __________.

Accepted Answer

A) B 
B) N 
C) C 
D) O 
E) none of the above 
A) B 
B) N 
C) C 
D) O 
E) none of the above

Question 13

The SI unit of an absorbed dose of radiation is the gray.

Accepted Answer

A) True 
 B)False

Question 14

What is required for a nuclear transmutation to occur?

Accepted Answer

A) very high temperature 
B) a corrosive environment 
C) a particle to collide with a nucleus 
D) spontaneous nuclear decay 
E) gamma emission 
A) very high temperature 
B) a corrosive environment 
C) a particle to collide with a nucleus 
D) spontaneous nuclear decay 
E) gamma emission

Question 15

Which of these nuclides is most likely to be radioactive?

Accepted Answer

A)    K 
B)    Al 
C)    I 
D)    Am 
E)    Bi 
A)    K 
B)    Al 
C)    I 
D)    Am 
E)    Bi

Question 16

Cobalt-60 is produced by a three reaction process involving neutron capture, beta-emission, and neutron capture. The initial reactant in the production of cobalt-60 is __________.

Accepted Answer

A) "59Co" 
B) "56Fe" 
C) "58Fe" 
D) "61Co" 
E) "60Fe" 
A) "59Co" 
B) "56Fe" 
C) "58Fe" 
D) "61Co" 
E) "60Fe"

Question 17

The formation of krypton from rubidium decay is a result of __________.

Accepted Answer

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

Question 18

The relative biological effectiveness (RBE)is 10 fold greater for gamma radiation than for alpha radiation.

Accepted Answer

A) True 
 B)False

Question 19

The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years?

Accepted Answer

A) 0.837 
B) 3.23 × 10-15 
C) 4.779 
D) 1.588 
E) 1.163 
A) 0.837 
B) 3.23 × 10-15 
C) 4.779 
D) 1.588 
E) 1.163

Question 20

Control rods in a nuclear reactor are composed of boron and __________.

Accepted Answer

The answer of Control rods in a nuclear reactor are...

Exam 21: Nuclear Chemistry

This reaction is an example of __________. P → Si + _____

When ionizing radiation enters the body, what is the predominant free radical produced?

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

The half-life of carbon-11 is 20.3 minutes. How much of a 100.0 mg sample remains after 1.50 hours?

The half-life of 223Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?

The decay of a radionuclide with a half-life of 2.3 × 105 years has a rate constant (in yr-1)equal to __________.

The reaction shown below is responsible for creating 14C in the atmosphere. What is the bombarding particle? N + _____ → C + H

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 Co nucleus? (The mass of a cobalt-60 nucleus is 59.9338 amu.)

The half-life for beta decay of strontium-90 is 28.8 years. A milk sample is found to contain 10.3 ppm strontium-90. How many years would pass before the strontium-90 concentration would drop to 1.0 ppm?

The beta decay of cesium-137 has a half-life of 30.0 years. How many years must pass to reduce a 25 mg sample of cesium 137 to 8.7 mg?

The basis for the carbon-14 dating method is that

In balancing the nuclear reaction C → E + e, the identity of element E is __________.

The SI unit of an absorbed dose of radiation is the gray.

What is required for a nuclear transmutation to occur?

Which of these nuclides is most likely to be radioactive?

Cobalt-60 is produced by a three reaction process involving neutron capture, beta-emission, and neutron capture. The initial reactant in the production of cobalt-60 is __________.

The formation of krypton from rubidium decay is a result of __________.

The relative biological effectiveness (RBE)is 10 fold greater for gamma radiation than for alpha radiation.

The half-life of cobalt-60 is 5.20 yr. How many milligrams of a 2.000-mg sample remains after 6.55 years?

Control rods in a nuclear reactor are composed of boron and __________.

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

This reaction is an example of ______. P → Si + _

The half-life of ²²³Ra is 11.4 days. How much of a 200.0 mg sample remains after 600 hours?

The decay of a radionuclide with a half-life of 2.3 × 10⁵ years has a rate constant (in yr^-1)equal to __________.

The reaction shown below is responsible for creating ¹⁴C in the atmosphere. What is the bombarding particle? N + _____ → C + H