Question 1

Arrange the following types of radiation from least penetrating to most penetrating: α,β,or γ.

Accepted Answer

A)   α 
B)   β 
C)   γ 
D)   α 
E)   β < a < g

Question 2

All of the following statements concerning nuclei are true EXCEPT

Accepted Answer

A)   only hydrogen-1 and helium-3 have more protons than neutrons.
B)   from He to Ca,stable nuclei have roughly equal numbers of protons and neutrons.
C)   elements with odd atomic numbers have more stable isotopes than do those with even atomic numbers.
D)   the neutron to proton ratio in stable nuclei increases as mass increases.
E)   more stable isotopes have an even number of neutrons than an odd number.

Question 3

A certain radioactive isotope has a rate constant of decay of 2.90 × 10-2 min-1.Calculate the time required for a sample of this isotope to decay to one-fourth of its initial value.

Accepted Answer

A)   23.9 min
B)   29.9 min
C)   0.0580 min
D)   47.8 min
E)   2.90 min

Question 4

The symbol Sn stands for the element

Accepted Answer

A)   sulfur
B)   strontium
C)   silicon
D)   tin
E)   sodium

Question 5

How many electrons are present in a bromine atom with a mass number of 86?

Accepted Answer

A)   35
B)   86
C)   121
D)   51
E)   6.02 × 1023

Question 6

Write the name for Ag.______________

Accepted Answer

The answer of Write the name for Ag.______________...

Question 7

The mass number of an atom is equal to _____.

Accepted Answer

A)   the sum of the number of neutrons and the number of electrons per atom.
B)   the atomic mass of an element.
C)   the atomic number of an element.
D)   the sum of the number of protons and the number of neutrons per atom.
E)   None of the above

Question 8

Which of the following isotopes has the longest half-life?

Accepted Answer

A)   Uranium-238
B)   Copernicium-227
C)   Strontium-90
D)   Iodine-131
E)   Carbon-12

Question 9

The symbol Cm stands for the element

Accepted Answer

A)   curium
B)   cerium
C)   cadmium
D)   carbon
E)   calcium

Question 10

A radioactive isotope undergoes a positron emission.After 2.00 h,6.320% of the initial amount of the isotope remains undecayed.What is the half-life of this isotope?

Accepted Answer

A)   45.0 min
B)   30.1 min
C)   90.0 min
D)   15.0 min
E)   60.0 min

Question 11

The symbol Fe stands for the element

Accepted Answer

A)   francium
B)   fluorine
C)   fermium
D)   tin
E)   iron

Question 12

The symbol for lead is

Accepted Answer

A)   Ld
B)   Pb
C)   P
D)   L
E)   Le

Question 13

Which of the following elements has a symbol that does not come from the English name?

Accepted Answer

A)   boron
B)   argon
C)   potassium
D)   cobalt
E)   magnesium

Question 14

What percentage of the world's electricity is supplied by nuclear fusion reactors?

Accepted Answer

A)   0%
B)   3%
C)   8%
D)   17%
E)   39%

Question 15

The becquerel is an SI unit for the measurement of radiation.1 Bq represents _____.

Accepted Answer

A)   1 J energy absorbed per kg of tissue
B)   3.7 × 1010 disintegrations per second
C)   1 disintegration per second
D)   0.01 J energy absorbed per kg of tissue
E)   1 calorie energy absorbed per kg of tissue

Question 16

Which of the following is the most probable mode of radioactive decay for  ?

Accepted Answer

A)   beta emission
B)   gamma emission
C)   neutron emission
D)   alpha emission
E)   positron emission

Question 17

In chemistry,a formula is used to represent

Accepted Answer

A)   a compound
B)   an element
C)   a metal
D)   all of these
E)   none of these

Question 18

Explain the difference between 1 rad and 1 rem of radiation.

Accepted Answer

One radiation absorbed dose (rad)equals ...

Question 19

Complete the following fission reaction:

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 20

When the radioactive nucleus  undergoes an alpha emission,what is the product nucleus?

Accepted Answer

A)   
B)   
C)   
D)   
E)

Exam 26: Nuclear Chemistry

A radioactive isotope undergoes a positron emission.After 2.00 h,6.320% of the initial amount of the isotope remains undecayed.What is the half-life of this isotope?

Correct AnswerverifiedShow Answer

The mass number of an atom is equal to _____.

Correct AnswerverifiedShow Answer

The symbol Cm stands for the element

Correct AnswerverifiedShow Answer

What percentage of the world's electricity is supplied by nuclear fusion reactors?

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When the radioactive nucleus undergoes an alpha emission,what is the product nucleus?

Correct AnswerverifiedShow Answer

In chemistry,a formula is used to represent

Correct AnswerverifiedShow Answer

Which of the following is the most probable mode of radioactive decay for ?

Correct AnswerverifiedShow Answer

The becquerel is an SI unit for the measurement of radiation.1 Bq represents _____.

Correct AnswerverifiedShow Answer

Arrange the following types of radiation from least penetrating to most penetrating: α,β,or γ.

Correct AnswerverifiedShow Answer

All of the following statements concerning nuclei are true EXCEPT

Correct AnswerverifiedShow Answer

Explain the difference between 1 rad and 1 rem of radiation.

Correct AnswerverifiedOne radiation absorbed dose (rad)equals ...View AnswerShow Answer

The symbol Sn stands for the element

Correct AnswerverifiedShow Answer

The symbol Fe stands for the element

Correct AnswerverifiedShow Answer

Complete the following fission reaction:

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How many electrons are present in a bromine atom with a mass number of 86?

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Which of the following elements has a symbol that does not come from the English name?

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The symbol for lead is

Correct AnswerverifiedShow Answer

Write the name for Ag.______________

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Which of the following isotopes has the longest half-life?

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A certain radioactive isotope has a rate constant of decay of 2.90 × 10-2 min-1.Calculate the time required for a sample of this isotope to decay to one-fourth of its initial value.

Correct AnswerverifiedShow Answer

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One radiation absorbed dose (rad)equals ...
View Answer

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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Correct Answer
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Correct Answer
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A certain radioactive isotope has a rate constant of decay of 2.90 × 10^-2 min^-1.Calculate the time required for a sample of this isotope to decay to one-fourth of its initial value.

Correct Answer
verified