Question 1

The energy of the sun comes from fusion reactions.

Accepted Answer

A) True 
 B)False

Question 2

If an object has 6.25% of the C-14   activity as a living organism,the age of the item is:

Accepted Answer

A) 11,460 years. 
B) 17,190 years. 
C) 22,920 years. 
D) 28,650 years. 
E) More information is needed. 
A) 11,460 years. 
B) 17,190 years. 
C) 22,920 years. 
D) 28,650 years. 
E) More information is needed.

Question 3

In a nuclear equation:

Accepted Answer

A) the daughter nuclide appears on the right-side of the arrow. 
B) the sum of the atomic numbers on both sides must be equal. 
C) the sum of the mass numbers on both sides must be equal. 
D) all of the above 
E) none of the above 
A) the daughter nuclide appears on the right-side of the arrow. 
B) the sum of the atomic numbers on both sides must be equal. 
C) the sum of the mass numbers on both sides must be equal. 
D) all of the above 
E) none of the above

Question 4

Nuclides that decay slowly have long half-lives.

Accepted Answer

A) True 
 B)False

Question 5

A 3.6 mole sample of Co-60 has a half-life of 5.2 years.How many moles of Co is left after

Accepted Answer

A) 0.056 
B) 0.11 
C) 0.23 
D) 0 
E) none of the above 
A) 0.056 
B) 0.11 
C) 0.23 
D) 0 
E) none of the above

Question 6

Radiation therapy involves:

Accepted Answer

A) radioactive isotopes that are used in place of x-rays. 
B) radioactive isotopes that are absorbed by specific organs. 
C) destroying cancerous cells by intense radiation levels. 
D) acute radiation exposure. 
E) none of the above. 
A) radioactive isotopes that are used in place of x-rays. 
B) radioactive isotopes that are absorbed by specific organs. 
C) destroying cancerous cells by intense radiation levels. 
D) acute radiation exposure. 
E) none of the above.

Question 7

When an atom emits a beta particle,its atomic number increases by one because it now has one additional proton.

Accepted Answer

A) True 
 B)False

Question 8

Why can U-235 produce a chain reaction?

Accepted Answer

A) Extremely high amounts of energy are released in the reaction. 
B) Neutrons produce the fission reaction and are also a product of the reaction. 
C) All elements above bismuth (#83)can undergo fission based chain reactions. 
D) Chain reactions merely need sufficient mass (critical mass)to start. 
E) All of the above are true. 
A) Extremely high amounts of energy are released in the reaction. 
B) Neutrons produce the fission reaction and are also a product of the reaction. 
C) All elements above bismuth (#83)can undergo fission based chain reactions. 
D) Chain reactions merely need sufficient mass (critical mass)to start. 
E) All of the above are true.

Question 9

Which of the following statements regarding radiation are FALSE?

Accepted Answer

A) Radioactivity is a natural part of our environment. 
B) All elements heavier than bismuth are radioactive. 
C) All radioactive elements are spontaneously decaying towards formation of a stable element. 
D) The time for half of the original sample to spontaneously decay is called the half-life   
E) All of the above are true. 
A) Radioactivity is a natural part of our environment. 
B) All elements heavier than bismuth are radioactive. 
C) All radioactive elements are spontaneously decaying towards formation of a stable element. 
D) The time for half of the original sample to spontaneously decay is called the half-life   
E) All of the above are true.

Question 10

When   Th undergoes alpha decay,what is the atomic mass of the element that is produced?

Accepted Answer

A) 88 
B) 228 
C) 236 
D) 92 
E) none of the above 
A) 88 
B) 228 
C) 236 
D) 92 
E) none of the above

Question 11

A nuclide with a shorter half-life would be considered more active than a nuclide with a longer half-life.

Accepted Answer

A) True 
 B)False

Question 12

A fusion reaction emits large amounts of energy while a fission reaction absorbs large amounts of energy.

Accepted Answer

A) True 
 B)False

Question 13

Nuclear power is criticized because:

Accepted Answer

A) of long term storage issues of radioactive wastes. 
B) it is an expensive form of energy. 
C) it is not as efficient as burning fossil fuels. 
D) of the danger of detonation into a nuclear bomb. 
E) all of the above 
A) of long term storage issues of radioactive wastes. 
B) it is an expensive form of energy. 
C) it is not as efficient as burning fossil fuels. 
D) of the danger of detonation into a nuclear bomb. 
E) all of the above

Question 14

Nuclear fusion:

Accepted Answer

A) requires intense temperatures that make it impossible to harness as an energy source with our current technology. 
B) is the basis of the hydrogen bomb. 
C) can be done but requires the detonation of a traditional fission bomb. 
D) is a possible energy source of the future. 
E) all of the above 
A) requires intense temperatures that make it impossible to harness as an energy source with our current technology. 
B) is the basis of the hydrogen bomb. 
C) can be done but requires the detonation of a traditional fission bomb. 
D) is a possible energy source of the future. 
E) all of the above

Question 15

Briefly describe the main features of the three types of radiation: alpha,beta,and gamma.Also explain what happens to the nucleus of an atom when it is exposed to each of these.

Accepted Answer

1.Alpha radiation occurs when the nucleu

Question 16

F contains 11 protons and 9 neutrons.

Accepted Answer

A) True 
 B)False

Question 17

Radioactive elements become stable isotopes after emitting one of the radioactive particles

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is NOT a type of radioactive emission?

Accepted Answer

A) alpha rays 
B) beta rays 
C) gamma rays 
D) positrons 
E) All of the above are types of radioactive emissions. 
A) alpha rays 
B) beta rays 
C) gamma rays 
D) positrons 
E) All of the above are types of radioactive emissions.

Question 19

A gamma ray is a high energy photon.

Accepted Answer

A) True 
 B)False

Question 20

Which of the following is NOT a unit used for expressing radioactivity:

Accepted Answer

A) roentgen 
B) geiger 
C) rem 
D) curie 
E) All of the above are units used to express radioactivity. 
A) roentgen 
B) geiger 
C) rem 
D) curie 
E) All of the above are units used to express radioactivity.

The energy of the sun comes from fusion reactions.

If an object has 6.25% of the C-14 activity as a living organism,the age of the item is:

In a nuclear equation:

Nuclides that decay slowly have long half-lives.

A 3.6 mole sample of Co-60 has a half-life of 5.2 years.How many moles of Co is left after

Radiation therapy involves:

When an atom emits a beta particle,its atomic number increases by one because it now has one additional proton.

Why can U-235 produce a chain reaction?

Which of the following statements regarding radiation are FALSE?

When Th undergoes alpha decay,what is the atomic mass of the element that is produced?

A nuclide with a shorter half-life would be considered more active than a nuclide with a longer half-life.

A fusion reaction emits large amounts of energy while a fission reaction absorbs large amounts of energy.

Nuclear power is criticized because:

Nuclear fusion:

Briefly describe the main features of the three types of radiation: alpha,beta,and gamma.Also explain what happens to the nucleus of an atom when it is exposed to each of these.

F contains 11 protons and 9 neutrons.

Radioactive elements become stable isotopes after emitting one of the radioactive particles

Which of the following is NOT a type of radioactive emission?

A gamma ray is a high energy photon.

Which of the following is NOT a unit used for expressing radioactivity:

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Exam 17: Radioactivity and Nuclear Chemistry

The energy of the sun comes from fusion reactions.

If an object has 6.25% of the C-14 activity as a living organism,the age of the item is:

In a nuclear equation:

Nuclides that decay slowly have long half-lives.

A 3.6 mole sample of Co-60 has a half-life of 5.2 years.How many moles of Co is left after

Radiation therapy involves:

When an atom emits a beta particle,its atomic number increases by one because it now has one additional proton.

Why can U-235 produce a chain reaction?

Which of the following statements regarding radiation are FALSE?

When Th undergoes alpha decay,what is the atomic mass of the element that is produced?

A nuclide with a shorter half-life would be considered more active than a nuclide with a longer half-life.

A fusion reaction emits large amounts of energy while a fission reaction absorbs large amounts of energy.

Nuclear power is criticized because:

Nuclear fusion:

Briefly describe the main features of the three types of radiation: alpha,beta,and gamma.Also explain what happens to the nucleus of an atom when it is exposed to each of these.

F contains 11 protons and 9 neutrons.

Radioactive elements become stable isotopes after emitting one of the radioactive particles

Which of the following is NOT a type of radioactive emission?

A gamma ray is a high energy photon.

Which of the following is NOT a unit used for expressing radioactivity:

The Chemical World

Measurement and Problem Solving

Matter and Energy

Atoms and Elements

Molecules and Compounds

Chemical Composition

Chemical Reactions

Quantities in Chemical Reactions

Electrons in Atoms and the Periodic Table

Chemical Bonding

Gases

Liquids, solids, and Intermolecular Forces

Solutions

Acids and Bases

Chemical Equilibrium

Oxidation and Reduction

Organic Chemistry

Biochemistry

Filters