Question 1

What percentage of radiation exposure is a result of man-made sources?

Accepted Answer

A)  18% 
B)  25% 
C)  50% 
D)  82% 
E)  95% 
A)  18% 
B)  25% 
C)  50% 
D)  82% 
E)  95%

Question 2

Which among the following scientists discovered radioactivity when a photographic plate was exposed to a piece of uranium?

Accepted Answer

A)  Becquerel 
B)  Curie 
C)  Einstein 
D)  Rutherford 
E)  Thompson 
A)  Becquerel 
B)  Curie 
C)  Einstein 
D)  Rutherford 
E)  Thompson

Question 3

Identify the radioactive emission with the highest penetrating power.

Accepted Answer

A)  Electrons 
B)  Beta particles 
C)  Alpha particles 
D)  Gamma rays 
E)  Neutrons 
A)  Electrons 
B)  Beta particles 
C)  Alpha particles 
D)  Gamma rays 
E)  Neutrons

Question 4

Which of these is the correct representation of a beta particle?

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 5

What percentage of a radioactive sample will remain after three 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 6

Which among the following causes major problems for controlled energy generation by fission reaction?

Accepted Answer

A)  Air pollution 
B)  Acid rain 
C)  Greenhouse gas emission 
D)  Waste disposal 
E)  Low energy yield per pound 
A)  Air pollution 
B)  Acid rain 
C)  Greenhouse gas emission 
D)  Waste disposal 
E)  Low energy yield per pound

Question 7

Which of these is/are a possible effect of radiation exposure?

Accepted Answer

A)  Death 
B)  Birth defects 
C)  Increased risk of cancer 
D)  Radiation sickness 
E)  All of these 
A)  Death 
B)  Birth defects 
C)  Increased risk of cancer 
D)  Radiation sickness 
E)  All of these

Question 8

Radioactivity results from the decay of unstable _____.

Accepted Answer

A)  electrons 
B)  light nuclei 
C)  heavy nuclei 
D)  photons 
E)  bonds 
A)  electrons 
B)  light nuclei 
C)  heavy nuclei 
D)  photons 
E)  bonds

Question 9

How many half-lives has a fossilized tree undergone if it contains 12.5% of its original carbon-14?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  16 
A)  1 
B)  2 
C)  3 
D)  4 
E)  16

Question 10

Which of the following terms describes the self-sustaining process of fission?

Accepted Answer

A)  Binding energy 
B)  Chain reaction 
C)  Alpha emission 
D)  Gamma radiation 
E)  Radioactivity 
A)  Binding energy 
B)  Chain reaction 
C)  Alpha emission 
D)  Gamma radiation 
E)  Radioactivity

Question 11

Which type of radioactive emission is analogous to an electron emission?

Accepted Answer

A)  Positron 
B)  Neutron 
C)  Alpha particle 
D)  Gamma ray 
E)  Beta particle 
A)  Positron 
B)  Neutron 
C)  Alpha particle 
D)  Gamma ray 
E)  Beta particle

Question 12

Which of the following occurs during gamma emission?

Accepted Answer

A)  The mass number increases. 
B)  The mass number decreases. 
C)  The atomic number increases. 
D)  The atomic number decreases. 
E)  The mass number and the atomic number remain the same. 
A)  The mass number increases. 
B)  The mass number decreases. 
C)  The atomic number increases. 
D)  The atomic number decreases. 
E)  The mass number and the atomic number remain the same.

Question 13

The half-life of protactinium-231 is 3.25 × 10  4  years. How much time will 10.4 g of Pa-231 take to decay into 2.6 g?

Accepted Answer

A)  8.1 × 106 years 
B)  4.0 × 105 years 
C)  1.3 × 105 years 
D)  6.5 × 104 years 
E)  1.5 × 104 years 
A)  8.1 × 106 years 
B)  4.0 × 105 years 
C)  1.3 × 105 years 
D)  6.5 × 104 years 
E)  1.5 × 104 years

What percentage of radiation exposure is a result of man-made sources?

Which among the following scientists discovered radioactivity when a photographic plate was exposed to a piece of uranium?

Identify the radioactive emission with the highest penetrating power.

Which of these is the correct representation of a beta particle?

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

Which among the following causes major problems for controlled energy generation by fission reaction?

Which of these is/are a possible effect of radiation exposure?

Radioactivity results from the decay of unstable _____.

How many half-lives has a fossilized tree undergone if it contains 12.5% of its original carbon-14?

Which of the following terms describes the self-sustaining process of fission?

Which type of radioactive emission is analogous to an electron emission?

Which of the following occurs during gamma emission?

The half-life of protactinium-231 is 3.25 × 10 ⁴ years. How much time will 10.4 g of Pa-231 take to decay into 2.6 g?

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Exam 8: Nuclear Chemistry

What percentage of radiation exposure is a result of man-made sources?

Which among the following scientists discovered radioactivity when a photographic plate was exposed to a piece of uranium?

Identify the radioactive emission with the highest penetrating power.

Which of these is the correct representation of a beta particle?

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

Which among the following causes major problems for controlled energy generation by fission reaction?

Which of these is/are a possible effect of radiation exposure?

Radioactivity results from the decay of unstable _____.

How many half-lives has a fossilized tree undergone if it contains 12.5% of its original carbon-14?

Which of the following terms describes the self-sustaining process of fission?

Which type of radioactive emission is analogous to an electron emission?

Which of the following occurs during gamma emission?

The half-life of protactinium-231 is 3.25 × 10 4 years. How much time will 10.4 g of Pa-231 take to decay into 2.6 g?

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

Filters

The half-life of protactinium-231 is 3.25 × 10 ⁴ years. How much time will 10.4 g of Pa-231 take to decay into 2.6 g?