Question 1

Identify the missing species in the following nuclear transmutation.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and C)

Question 2

Which equation correctly represents electron capture by the  nucleus?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) A) and C)

Question 3

A mass of 6.02 × 1026 amu is equivalent to

Accepted Answer

A)   1 J.
B)   1 kg.
C)   1 g.
D)   1 mol.
E)   1 mg.F) A) and E)
G) All of the above

Question 4

Identify the missing species in the following nuclear transmutation. U-238 + ? → 1 neutron + Fm-249

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and B)
G) D) and E)

Question 5

When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed?

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) None of the above
G) C) and E)

Question 6

Alpha particles are identical to

Accepted Answer

A)   protons.
B)   helium atoms.
C)   hydrogen atoms.
D)   helium nuclei.
E)   electrons.F) A) and B)
G) A) and C)

Question 7

What is the energy equivalent of 1 amu? (c = 2.99792458 × 108 m/s)

Accepted Answer

A)   5.0 × 10-19 J
B)   5.4 × 1043 J
C)   6.6 × 109 J
D)   1.5 × 10-10 JE) A) and B)
F) C) and D)

Question 8

The ________ has the same mass as the electron, but bears a charge of +1.

Accepted Answer

The answer of The ________ has the same mass as...

Question 9

A bottle of vintage red wine has lost its label. The concentration of tritium (  ) in the wine is 0.34 times that found in freshly bottled wines. If the half-life of tritium is 12.3 years, estimate the time elapsed since the wine was bottled.

Accepted Answer

The answer of A bottle of vintage red wine has...

Question 10

An isotope with a high value of N/Z will tend to decay through

Accepted Answer

A)   α decay.
B)   β decay.
C)   positron decay.
D)   electron capture.
E)   γ decay.F) C) and E)
G) B) and C)

Question 11

The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? (The half-life of 14C is 5730 yr.)

Accepted Answer

A)   1460 yr
B)   1910 yr
C)   3350 yr
D)   3820 yr
E)   9080 yrF) B) and E)
G) B) and C)

Question 12

What is the nuclear process called where small nuclei are combined into larger ones?

Accepted Answer

A)   Photonuclear reactions
B)   Nuclear fission
C)   Thermal conductivity
D)   Nuclear combination
E)   Nuclear fusionF) B) and D)
G) A) and C)

Question 13

In the following reaction, identify X.

Accepted Answer

A)   
B)   
C)   
D)   
E)   F) A) and D)
G) A) and C)

Question 14

Which type of radiation is the least dangerous to humans?

Accepted Answer

A)   Positrons
B)   Neutrons
C)   Alpha
D)   Beta
E)   GammaF) A) and D)
G) A) and C)

Question 15

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for 238U → 206Pb is 4.51 × 109 yr.)

Accepted Answer

A)   1.32 atoms
B)   5.8 × 10-6 atoms
C)   2.4 × 1018 atoms
D)   3.3 × 1018 atoms
E)   3.5 × 1021 atomsF) A) and E)
G) C) and D)

Question 16

In the equation below, what particle or type of radiation needs to be included to balance the equation? 234Th → ? + beta particle

Accepted Answer

A)   Ac-234
B)   Pa-234
C)   Ac-235
D)   Pa-235
E)   Ac-233F) A) and B)
G) All of the above

Question 17

The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10-7 moles emitted 8.42 × 106 α particles in one year. What is the decay constant for thorium-232?

Accepted Answer

A)   3.35 × 10-14 yr-1
B)   4.96 × 10-11 yr-1
C)   1.40 × 1010 yr-1 
D)   2.99 × 1013 yr-1
E)   None of the answers is correct.F) B) and C)
G) A) and C)

Question 18

The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons is called the ________ ________.

Accepted Answer

The answer of The difference between the mass of an...

Question 19

Suppose you have two very sensitive balances that can measure the masses of individual particles, depicted below. In these figures, "p" corresponds to a proton, and "n" corresponds to a neutron.   What is the relationship between the mass readings of the two balances? (Neglect differences due to experimental uncertainty.)

Accepted Answer

A)   The mass reading of balance 1 will be much higher than the mass reading of balance 2.
B)   The mass reading of balance 1 will be slightly higher than the mass reading of balance 2.
C)   The mass reading of balance 1 will be exactly the same as the mass reading of balance 2.
D)   The mass reading of balance 1 will be slightly lower than the mass reading of balance 2.
E)   The mass reading of balance 1 will be much lower than the mass reading of balance 2.F) All of the above
G) A) and B)

Question 20

Which isotope, when bombarded with nitrogen-15, yields four neutrons and the artificial isotope dubnium-260?

Accepted Answer

A)   Californium-245
B)   Thorium-257
C)   Nobelium-245
D)   Californium-249
E)   Dubnium-249F) A) and E)
G) D) and E)

Exam 20: Nuclear Chemistry

In the following reaction, identify X.

Correct Answer
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The ________ has the same mass as the electron, but bears a charge of +1.

Correct Answer
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The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10^-7 moles emitted 8.42 × 10⁶ α particles in one year. What is the decay constant for thorium-232?

Correct Answer
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When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed?

Correct Answer
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What is the nuclear process called where small nuclei are combined into larger ones?

Correct Answer
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Identify the missing species in the following nuclear transmutation.

Correct Answer
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A mass of 6.02 × 10²⁶ amu is equivalent to

Correct Answer
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Identify the missing species in the following nuclear transmutation. U-238 + ? → 1 neutron + Fm-249

Correct Answer
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Which isotope, when bombarded with nitrogen-15, yields four neutrons and the artificial isotope dubnium-260?

Correct Answer
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What is the energy equivalent of 1 amu? (c = 2.99792458 × 10⁸ m/s)

Correct Answer
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An isotope with a high value of N/Z will tend to decay through

Correct Answer
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A bottle of vintage red wine has lost its label. The concentration of tritium ( ) in the wine is 0.34 times that found in freshly bottled wines. If the half-life of tritium is 12.3 years, estimate the time elapsed since the wine was bottled.

Correct Answer
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Which equation correctly represents electron capture by the nucleus?

Correct Answer
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Correct Answer
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Alpha particles are identical to

Correct Answer
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The ¹⁴C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? (The half-life of ¹⁴C is 5730 yr.)

Correct Answer
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In the equation below, what particle or type of radiation needs to be included to balance the equation? ²³⁴Th → ? + beta particle

Correct Answer
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The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons is called the .

Correct Answer
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Which type of radiation is the least dangerous to humans?

Correct Answer
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A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for ²³⁸U → ²⁰⁶Pb is 4.51 × 10⁹ yr.)

Correct Answer
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Exam 20: Nuclear Chemistry

In the following reaction, identify X.

Correct AnswerverifiedShow Answer

The ________ has the same mass as the electron, but bears a charge of +1.

Correct AnswerverifiedShow Answer

The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10-7 moles emitted 8.42 × 106 α particles in one year. What is the decay constant for thorium-232?

Correct AnswerverifiedShow Answer

When atoms of beryllium-9 are bombarded with alpha particles, neutrons are produced. What new isotope is also formed?

Correct AnswerverifiedShow Answer

What is the nuclear process called where small nuclei are combined into larger ones?

Correct AnswerverifiedShow Answer

Identify the missing species in the following nuclear transmutation.

Correct AnswerverifiedShow Answer

A mass of 6.02 × 1026 amu is equivalent to

Correct AnswerverifiedShow Answer

Identify the missing species in the following nuclear transmutation. U-238 + ? → 1 neutron + Fm-249

Correct AnswerverifiedShow Answer

Which isotope, when bombarded with nitrogen-15, yields four neutrons and the artificial isotope dubnium-260?

Correct AnswerverifiedShow Answer

What is the energy equivalent of 1 amu? (c = 2.99792458 × 108 m/s)

Correct AnswerverifiedShow Answer

An isotope with a high value of N/Z will tend to decay through

Correct AnswerverifiedShow Answer

A bottle of vintage red wine has lost its label. The concentration of tritium ( ) in the wine is 0.34 times that found in freshly bottled wines. If the half-life of tritium is 12.3 years, estimate the time elapsed since the wine was bottled.

Correct AnswerverifiedShow Answer

Which equation correctly represents electron capture by the nucleus?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Alpha particles are identical to

Correct AnswerverifiedShow Answer

The 14C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? (The half-life of 14C is 5730 yr.)

Correct AnswerverifiedShow Answer

In the equation below, what particle or type of radiation needs to be included to balance the equation? 234Th → ? + beta particle

Correct AnswerverifiedShow Answer

The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons is called the ________ ________.

Correct AnswerverifiedShow Answer

Which type of radiation is the least dangerous to humans?

Correct AnswerverifiedShow Answer

A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for 238U → 206Pb is 4.51 × 109 yr.)

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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The radiochemist, Will I. Glow, studied thorium-232 and found that 2.82 × 10^-7 moles emitted 8.42 × 10⁶ α particles in one year. What is the decay constant for thorium-232?

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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A mass of 6.02 × 10²⁶ amu is equivalent to

Correct Answer
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Correct Answer
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Correct Answer
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What is the energy equivalent of 1 amu? (c = 2.99792458 × 10⁸ m/s)

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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The ¹⁴C activity of some ancient Peruvian corn was found to be 10 disintegrations per minute per gram of carbon. If present-day plant life shows 15 dpm/g, how old is the Peruvian corn? (The half-life of ¹⁴C is 5730 yr.)

Correct Answer
verified

In the equation below, what particle or type of radiation needs to be included to balance the equation? ²³⁴Th → ? + beta particle

Correct Answer
verified

The difference between the mass of an atom and the sum of the masses of its protons, neutrons, and electrons is called the .

Correct Answer
verified

Correct Answer
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A rock contains 0.37 mg of Pb-206 and 0.95 mg of U-238. Approximately how many U-238 atoms were in the rock when it was formed billions of years ago? (The half life for ²³⁸U → ²⁰⁶Pb is 4.51 × 10⁹ yr.)

Correct Answer
verified