Question 1

How many years old is a fossilized tree if it contains 25% of its original carbon-14? (Assume that the half-life of carbon-14 = 5,730 years.)

Accepted Answer

A)  1,433 
B)  5,730 
C)  11,460 
D)  17,190 
E)  22,920 
A)  1,433 
B)  5,730 
C)  11,460 
D)  17,190 
E)  22,920

Question 2

What was the secret code name for the building of the first atomic bomb?

Accepted Answer

A)  Manhattan Project 
B)  Oralloy 
C)  Smiling Buddha 
D)  Project Albert 
E)  Site Y 
A)  Manhattan Project 
B)  Oralloy 
C)  Smiling Buddha 
D)  Project Albert 
E)  Site Y

Question 3

What percentage of a radioactive sample will remain after two half-lives?

Accepted Answer

A)  50% 
B)  25% 
C)  12.5% 
D)  6.25% 
E)  0% 
A)  50% 
B)  25% 
C)  12.5% 
D)  6.25% 
E)  0%

Question 4

Nuclear chemistry involves changes  in the _____.

Accepted Answer

A)  nucleus 
B)  valence electrons 
C)  bond number 
D)  inner electrons 
E)  photons 
A)  nucleus 
B)  valence electrons 
C)  bond number 
D)  inner electrons 
E)  photons

Question 5

_____ contains the heaviest stable nucleus.

Accepted Answer

A)  Bismuth 
B)  Uranium 
C)  Cobalt 
D)  Sodium 
E)  Potassium 
A)  Bismuth 
B)  Uranium 
C)  Cobalt 
D)  Sodium 
E)  Potassium

Question 6

Which among the following is the most significant problem in producing energy from fusion reactions?

Accepted Answer

A)  Limited resources 
B)  Air pollution 
C)  Low-energy yield 
D)  Excessive radioactivity 
E)  Requirement of high temperature for fusion reactions 
A)  Limited resources 
B)  Air pollution 
C)  Low-energy yield 
D)  Excessive radioactivity 
E)  Requirement of high temperature for fusion reactions

Question 7

A newly discovered rock formation contains fossils that are estimated to be 11,000 years old. Which radioactive dating method/methods would give the most accurate age of the fossils?
I. Uranium dating
II. Carbon-14 dating
III. Uranium-thorium dating

Accepted Answer

A)  I only 
B)  II only 
C)  III 
D)  I and II 
E)  I and III 
A)  I only 
B)  II only 
C)  III 
D)  I and II 
E)  I and III

Question 8

The difference between the experimentally determined mass and the sum of the masses of the protons and neutrons in an atom is known as the _____.

Accepted Answer

A)  nuclear mass 
B)  molar mass 
C)  mass defect 
D)  decay mass 
E)  isotopic mass 
A)  nuclear mass 
B)  molar mass 
C)  mass defect 
D)  decay mass 
E)  isotopic mass

Question 9

The half-life of an element is 15 minutes. A sample contains 20,000 atoms of the element. How many atoms of the element will remain after 30 minutes?

Accepted Answer

A)  2,000 
B)  5,000 
C)  10,000 
D)  2,500 
E)  1,000 
A)  2,000 
B)  5,000 
C)  10,000 
D)  2,500 
E)  1,000

Question 10

Which of the following radioactive elements was used in the Fat Man bomb?

Accepted Answer

A)  Polonium 
B)  Thorium 
C)  Uranium 
D)  Plutonium 
E)  Radium 
A)  Polonium 
B)  Thorium 
C)  Uranium 
D)  Plutonium 
E)  Radium

Question 11

Which of the following processes best describes a beta decay?

Accepted Answer

A)  A proton is converted into a neutron and an electron. 
B)  A neutron is converted into a proton and an electron. 
C)  A proton and an electron are converted into a neutron. 
D)  A neutron and an electron are converted into a proton. 
E)  A neutron and a proton are converted into an electron. 
A)  A proton is converted into a neutron and an electron. 
B)  A neutron is converted into a proton and an electron. 
C)  A proton and an electron are converted into a neutron. 
D)  A neutron and an electron are converted into a proton. 
E)  A neutron and a proton are converted into an electron.

Question 12

The amount of fissile material necessary for a self-sustained fission reaction is known as _____.

Accepted Answer

A)  radioactivity 
B)  tonnage 
C)  substantial mass 
D)  critical mass 
E)  chain reaction 
A)  radioactivity 
B)  tonnage 
C)  substantial mass 
D)  critical mass 
E)  chain reaction

Question 13

Which of these statements about fusion is correct ?

Accepted Answer

A)  Two lighter nuclei combine to form a heavier nucleus. 
B)  The fusion of uranium-238 nuclei was at the heart of the first atomic bomb. 
C)  Fusion waste products are typically more hazardous than fission materials. 
D)  Fusion reactions release a huge amount of energy but less than that of fission reactions. 
E)  All of these statements are correct. 
A)  Two lighter nuclei combine to form a heavier nucleus. 
B)  The fusion of uranium-238 nuclei was at the heart of the first atomic bomb. 
C)  Fusion waste products are typically more hazardous than fission materials. 
D)  Fusion reactions release a huge amount of energy but less than that of fission reactions. 
E)  All of these statements are correct.

Question 14

Which of the following pairs of  scientists built the first nuclear reactor?

Accepted Answer

A)  Einstein and Rutherford 
B)  Hahn and Strassmann 
C)  Curie and Becquerel 
D)  Meitner and Fermi 
E)  Fermi and Szilard 
A)  Einstein and Rutherford 
B)  Hahn and Strassmann 
C)  Curie and Becquerel 
D)  Meitner and Fermi 
E)  Fermi and Szilard

Question 15

The half-life of Sr-83 is 32.4 hours. How many emissions would have occurred when 20 g of strontium-83 decays to 4.0 g?

Accepted Answer

A)  3.39 × 1020 emissions 
B)  1.81 × 1022 emissions 
C)  2.90 × 1022 emissions 
D)  1.16 × 1023 emissions 
E)  1.45 × 1023 emissions 
A)  3.39 × 1020 emissions 
B)  1.81 × 1022 emissions 
C)  2.90 × 1022 emissions 
D)  1.16 × 1023 emissions 
E)  1.45 × 1023 emissions

Question 16

Calculate the mass defect of  17  O if its mass is 16.9991 amu; the mass of proton is 1.0073 amu, and mass of neutron is 1.0087 amu.

Accepted Answer

A)  0.155 amu 
B)  0.152 amu 
C)  0.148 amu 
D)  0.146 amu 
E)  0.1376 amu 
A)  0.155 amu 
B)  0.152 amu 
C)  0.148 amu 
D)  0.146 amu 
E)  0.1376 amu

Question 17

Which of these medical applications of nuclear chemistry is/are used in the treatment of cancerous tumors?

Accepted Answer

A)  Tracers 
B)  Fission 
C)  Chemotherapy 
D)  Radiation therapy 
E)  Mass defect 
A)  Tracers 
B)  Fission 
C)  Chemotherapy 
D)  Radiation therapy 
E)  Mass defect

Question 18

Which of these is the correct unit for measuring human radioactive exposure?

Accepted Answer

A)  Roentgen 
B)  Curie 
C)  Rem 
D)  Sievert 
E)  Becquerel 
A)  Roentgen 
B)  Curie 
C)  Rem 
D)  Sievert 
E)  Becquerel

Question 19

Which among the following is not an application of nuclear chemistry?

Accepted Answer

A)  Medicine 
B)  Energy 
C)  Radioactive dating 
D)  Warfare 
E)  All of these are applications of nuclear chemistry. 
A)  Medicine 
B)  Energy 
C)  Radioactive dating 
D)  Warfare 
E)  All of these are applications of nuclear chemistry.

Question 20

Calculate the mass defect of  37  Cl if its mass is 36.9659 amu; the mass of proton is 1.0073 amu, and the mass of neutron is 1.0087 amu.

Accepted Answer

A)  2.693 amu 
B)  0.388 amu 
C)  0.341 amu 
D)  0.332 amu 
E)  0.263 amu 
A)  2.693 amu 
B)  0.388 amu 
C)  0.341 amu 
D)  0.332 amu 
E)  0.263 amu

How many years old is a fossilized tree if it contains 25% of its original carbon-14? (Assume that the half-life of carbon-14 = 5,730 years.)

What was the secret code name for the building of the first atomic bomb?

What percentage of a radioactive sample will remain after two half-lives?

Nuclear chemistry involves changes in the _____.

_____ contains the heaviest stable nucleus.

Which among the following is the most significant problem in producing energy from fusion reactions?

A newly discovered rock formation contains fossils that are estimated to be 11,000 years old. Which radioactive dating method/methods would give the most accurate age of the fossils? I. Uranium dating II. Carbon-14 dating III. Uranium-thorium dating

The difference between the experimentally determined mass and the sum of the masses of the protons and neutrons in an atom is known as the _____.

The half-life of an element is 15 minutes. A sample contains 20,000 atoms of the element. How many atoms of the element will remain after 30 minutes?

Which of the following radioactive elements was used in the Fat Man bomb?

Which of the following processes best describes a beta decay?

The amount of fissile material necessary for a self-sustained fission reaction is known as _____.

Which of these statements about fusion is correct ?

Which of the following pairs of scientists built the first nuclear reactor?

The half-life of Sr-83 is 32.4 hours. How many emissions would have occurred when 20 g of strontium-83 decays to 4.0 g?

Calculate the mass defect of ¹⁷ O if its mass is 16.9991 amu; the mass of proton is 1.0073 amu, and mass of neutron is 1.0087 amu.

Which of these medical applications of nuclear chemistry is/are used in the treatment of cancerous tumors?

Which of these is the correct unit for measuring human radioactive exposure?

Which among the following is not an application of nuclear chemistry?

Calculate the mass defect of ³⁷ Cl if its mass is 36.9659 amu; the mass of proton is 1.0073 amu, and the mass of neutron is 1.0087 amu.

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Exam 8: Nuclear Chemistry

How many years old is a fossilized tree if it contains 25% of its original carbon-14? (Assume that the half-life of carbon-14 = 5,730 years.)

What was the secret code name for the building of the first atomic bomb?

What percentage of a radioactive sample will remain after two half-lives?

Nuclear chemistry involves changes in the _____.

_____ contains the heaviest stable nucleus.

Which among the following is the most significant problem in producing energy from fusion reactions?

A newly discovered rock formation contains fossils that are estimated to be 11,000 years old. Which radioactive dating method/methods would give the most accurate age of the fossils? I. Uranium dating II. Carbon-14 dating III. Uranium-thorium dating

The difference between the experimentally determined mass and the sum of the masses of the protons and neutrons in an atom is known as the _____.

The half-life of an element is 15 minutes. A sample contains 20,000 atoms of the element. How many atoms of the element will remain after 30 minutes?

Which of the following radioactive elements was used in the Fat Man bomb?

Which of the following processes best describes a beta decay?

The amount of fissile material necessary for a self-sustained fission reaction is known as _____.

Which of these statements about fusion is correct ?

Which of the following pairs of scientists built the first nuclear reactor?

The half-life of Sr-83 is 32.4 hours. How many emissions would have occurred when 20 g of strontium-83 decays to 4.0 g?

Calculate the mass defect of 17 O if its mass is 16.9991 amu; the mass of proton is 1.0073 amu, and mass of neutron is 1.0087 amu.

Which of these medical applications of nuclear chemistry is/are used in the treatment of cancerous tumors?

Which of these is the correct unit for measuring human radioactive exposure?

Which among the following is not an application of nuclear chemistry?

Calculate the mass defect of 37 Cl if its mass is 36.9659 amu; the mass of proton is 1.0073 amu, and the mass of neutron is 1.0087 amu.

Molecular Reasons

The Chemists Toolbox

Atoms and Elements

Molecules, Compounds, and Chemical Reactions

Chemical Bonding

Organic Chemistry

Light and Color

Energy for Today

Energy for Tomorrow: Solar and Other Renewable Energy Sources

The Air Around Us

The Liquids and Solids Around Us: Especially Water

Acids and Bases: the Molecules Responsible for Sour and Bitter

Oxidation and Reduction

The Chemistry of Household Products

Biochemistry and Biotechnology

Drugs and Medicine: Healing, Helping, and Hurting

The Chemistry of Food

Nanotechnology Online Only

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Calculate the mass defect of ¹⁷ O if its mass is 16.9991 amu; the mass of proton is 1.0073 amu, and mass of neutron is 1.0087 amu.

Calculate the mass defect of ³⁷ Cl if its mass is 36.9659 amu; the mass of proton is 1.0073 amu, and the mass of neutron is 1.0087 amu.