Question 1

A nuclear reaction in which a nucleus reacts with a subatomic particle or another nucleus to give a product nucleus that is more massive than the starting material is called a(n)  _____ reaction.

Accepted Answer

A)   nuclear decay
B)   positron emission
C)   spontaneous fission
D)   nuclear transmutation
E)   radioactive decayF) B) and C)
G) A) and E)

Question 2

Neutron-poor nuclei are a class of radioactive nuclei that:

Accepted Answer

A)   decay by a process that has the net effect of converting a proton to a neutron.
B)   tend to decay by emitting an alpha particle which reduces the number of neutrons and protons in the original nucleus by 2.
C)   have neutron-to-proton ratio that is too high to give a stable nucleus.
D)   lie on the upper left side of the band of stable nuclei.
E)   decay by a process which results in a decrease in the neutron-to-proton ratio.F) B) and C)
G) A) and E)

Question 3

What is positron emission? Explain with an example.

Accepted Answer

Positron emission is a nuclear decay rea...

Question 4

The atomic number is the number of neutrons in the nucleus of an atom.

Accepted Answer

A) True 
 B)False

Question 5

The amount of energy released when a nucleus forms from its component nucleons, which corresponds to the mass defect of the nucleus is called the _____ energy.

Accepted Answer

A)   bond
B)   nuclear binding
C)   lattice
D)   ionization
E)   electron bindingF) B) and D)
G) B) and E)

Question 6

The rate at which the radioactive decay occurs is a characteristic of the isotope.

Accepted Answer

A) True 
 B)False

Question 7

Nuclei that have even number of both protons and neutrons are generally stable.

Accepted Answer

A) True 
 B)False

Question 8

_____ is a nuclear decay reaction that results in the emission of a helium-4 nucleus.

Accepted Answer

A)   Beta decay
B)   Alpha decay
C)   Positron emission
D)   Electron decay
E)   Spontaneous emissionF) B) and E)
G) C) and D)

Question 9

What is a nuclear chain reaction? Give an example.

Accepted Answer

In a nuclear fission reaction, more than...

Question 10

Which of the following nuclides is most likely to undergo alpha decay?

Accepted Answer

A)    1636S{ } _ {16 } ^ { 36 }S1636​S 
B)    4299Mo{ } _ { 42 } ^ { 99 } \mathrm { Mo }4299​Mo 
C)    92235U{ } _ { 92 } ^ { 235 } \mathrm { U }92235​U 
D)    3580 Br { } _ { 35 } ^ { 80 }	ext { Br } 3580​ Br  
E)    3787Rb{ } _ { 37 } ^ { 87 } \mathrm { Rb }3787​RbF) None of the above
G) C) and D)

Question 11

Isotopes are nuclides with same number of neutrons but different numbers of protons.

Accepted Answer

A) True 
 B)False

Question 12

List out the various applications of radioisotopes.

Accepted Answer

<img  loading="lazy" src="/assets/images/blured-textbook.svg" class="d-inline m-1" alt="blured image" width="139" height="30">Radiations have been used medically to t...

Question 13

Which of the following ionizing radiations have a high charge and mass and hence do not penetrate deeply into an object?

Accepted Answer

A)   γ radiations
B)   X-rays
C)   β particles
D)   α radiations
E)   δ radiationsF) C) and D)
G) A) and C)

Question 14

The binding energy per nucleon for uranium 238 is _____ MeV/nucleon. (Given, the experimentally determined mass of  238U{ } ^ { 238 } \mathrm { U }238U  = 238.050788 amu, mass of proton = 1.007825 amu and mass of neutron = 1.008665 amu)

Accepted Answer

A)   1.93
B)   7.57
C)   9.27
D)   1800
E)   1.48 F) C) and E)
G) B) and C)

Question 15

The component of a nuclear reactor that is used to decrease the kinetic energy of neutrons by the radioactive decay of the fuel to initiate a chain reaction is called a _____.

Accepted Answer

A)   condenser
B)   steam generator
C)   moderator
D)   fuel rod
E)   control rodF) B) and D)
G) A) and D)

Question 16

The element that accounts for about 90% of all atoms in the known universe is _____.

Accepted Answer

The answer of The element that accounts for about 90%...

Question 17

The radiation emitted when a nucleus undergoes spontaneous fission is _____.

Accepted Answer

A)    00γ { } _ { 0 } ^ { 0 } \gamma00​γ 
B)    +10β{ } _ { + 1 } ^ { 0 } \beta+10​β 
C)    24α{ } _ { 2 } ^ { 4 } \alpha24​α 
D)    01n{ } _ { 0 } ^ { 1 } n01​n 
E)    −10β{ } _ { -1 } ^ { 0 }\beta−10​βF) A) and E)
G) A) and D)

Question 18

The net result of an alpha emission is an increase in the neutron-to-proton ratio.

Accepted Answer

A) True 
 B)False

Question 19

The daughter nuclei that result from the radioactive decay of an element are less stable than the parent nucleus.

Accepted Answer

A) True 
 B)False

Question 20

Light-water reactors use unenriched uranium as a fuel.

Accepted Answer

A) True 
 B)False

Exam 20: Nuclear Chemistry

A nuclear reaction in which a nucleus reacts with a subatomic particle or another nucleus to give a product nucleus that is more massive than the starting material is called a(n) _____ reaction.

Correct AnswerverifiedShow Answer

The atomic number is the number of neutrons in the nucleus of an atom.

Correct AnswerverifiedShow Answer

The element that accounts for about 90% of all atoms in the known universe is _____.

Correct AnswerverifiedShow Answer

The amount of energy released when a nucleus forms from its component nucleons, which corresponds to the mass defect of the nucleus is called the _____ energy.

Correct AnswerverifiedShow Answer

Light-water reactors use unenriched uranium as a fuel.

Correct AnswerverifiedShow Answer

What is positron emission? Explain with an example.

Correct AnswerverifiedPositron emission is a nuclear decay rea...View AnswerShow Answer

The radiation emitted when a nucleus undergoes spontaneous fission is _____.

Correct AnswerverifiedShow Answer

What is a nuclear chain reaction? Give an example.

Correct AnswerverifiedIn a nuclear fission reaction, more than...View AnswerShow Answer

_____ is a nuclear decay reaction that results in the emission of a helium-4 nucleus.

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Neutron-poor nuclei are a class of radioactive nuclei that:

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Nuclei that have even number of both protons and neutrons are generally stable.

Correct AnswerverifiedShow Answer

The binding energy per nucleon for uranium 238 is _____ MeV/nucleon. (Given, the experimentally determined mass of 238U{ } ^ { 238 } \mathrm { U }238U = 238.050788 amu, mass of proton = 1.007825 amu and mass of neutron = 1.008665 amu)

Correct AnswerverifiedShow Answer

List out the various applications of radioisotopes.

Correct AnswerverifiedRadiations have been used medically to t...View AnswerShow Answer

The daughter nuclei that result from the radioactive decay of an element are less stable than the parent nucleus.

Correct AnswerverifiedShow Answer

The rate at which the radioactive decay occurs is a characteristic of the isotope.

Correct AnswerverifiedShow Answer

The component of a nuclear reactor that is used to decrease the kinetic energy of neutrons by the radioactive decay of the fuel to initiate a chain reaction is called a _____.

Correct AnswerverifiedShow Answer

Which of the following ionizing radiations have a high charge and mass and hence do not penetrate deeply into an object?

Correct AnswerverifiedShow Answer

Which of the following nuclides is most likely to undergo alpha decay?

Correct AnswerverifiedShow Answer

The net result of an alpha emission is an increase in the neutron-to-proton ratio.

Correct AnswerverifiedShow Answer

Isotopes are nuclides with same number of neutrons but different numbers of protons.

Correct AnswerverifiedShow Answer

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Positron emission is a nuclear decay rea...
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In a nuclear fission reaction, more than...
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The binding energy per nucleon for uranium 238 is _____ MeV/nucleon. (Given, the experimentally determined mass of ${ } ^ { 238 } \mathrm { U }$ = 238.050788 amu, mass of proton = 1.007825 amu and mass of neutron = 1.008665 amu)

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Radiations have been used medically to t...
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