Question 1

When an alpha particle is emitted from an unstable nucleus, the atomic mass number of the nucleus

Accepted Answer

A)  increases by 2. 
B)  decreases by 4. 
C)  stays unchanged. 
D)  decreases by 2. 
E)  increases by 4. 
A)  increases by 2. 
B)  decreases by 4. 
C)  stays unchanged. 
D)  decreases by 2. 
E)  increases by 4. B

Question 2

Marie & Pierre Curie

Accepted Answer

A)  discovered radioactivity. 
B)  proposed the plum-pudding model. 
C)  observed back-scattering from nuclei. 
D)  discovered radium and polonium. 
E)  proposed the tiny central nucleus idea. 
A)  discovered radioactivity. 
B)  proposed the plum-pudding model. 
C)  observed back-scattering from nuclei. 
D)  discovered radium and polonium. 
E)  proposed the tiny central nucleus idea. D

Question 3

What are the mass number and the atomic number for each of the following:
(a) beta+?
(b) beta-?

Accepted Answer

(a) 0, 1
(b) 0, -1

Question 4

What is the binding energy of the 4He nucleus?

Accepted Answer

A)  10.77 MeV 
B)  7.80 MeV 
C)  14.15 MeV 
D)  28.3 MeV 
E)  20.36 MeV 
A)  10.77 MeV 
B)  7.80 MeV 
C)  14.15 MeV 
D)  28.3 MeV 
E)  20.36 MeV

Question 5

The type of detector that requires a magnetic field to "view" charged particles is a

Accepted Answer

A)  Geiger tube. 
B)  spark chamber. 
C)  bubble chamber. 
D)  scintillation counter. 
E)  cloud chamber. 
A)  Geiger tube. 
B)  spark chamber. 
C)  bubble chamber. 
D)  scintillation counter. 
E)  cloud chamber.

Question 6

The normal U.S. average annual radiation dose per person is about how many REM?

Accepted Answer

The answer of The normal U.S. average annual radiation dose...

Question 7

J. J. Thomson

Accepted Answer

A)  observed back-scattering from nuclei. 
B)  proposed the tiny central nucleus idea. 
C)  proposed the plum-pudding model. 
D)  discovered radium and polonium. 
E)  invented the particle detector tube. 
A)  observed back-scattering from nuclei. 
B)  proposed the tiny central nucleus idea. 
C)  proposed the plum-pudding model. 
D)  discovered radium and polonium. 
E)  invented the particle detector tube.

Question 8

Isotopes of an element have nuclei with

Accepted Answer

A)  a different number of protons, and the same numbers of neutrons. 
B)  the same number of protons, but different numbers of electrons. 
C)  a different number of protons, and a different number of neutrons. 
D)  the same number of protons, but different numbers of neutrons. 
E)  the same number of protons, and the same number of neutrons. 
A)  a different number of protons, and the same numbers of neutrons. 
B)  the same number of protons, but different numbers of electrons. 
C)  a different number of protons, and a different number of neutrons. 
D)  the same number of protons, but different numbers of neutrons. 
E)  the same number of protons, and the same number of neutrons.

Question 9

The binding energy of most nuclei is proportional to

Accepted Answer

A)   
B)  A2. 
C)  A3. 
D)  Z2. 
E)  A. 
A)   
B)  A2. 
C)  A3. 
D)  Z2. 
E)  A.

Question 10

In which of the following application of technology in the home is radioactivity utilized?

Accepted Answer

A)  a door-bell 
B)  a food sterilizer 
C)  a smoke detector 
D)  a humidifier 
A)  a door-bell 
B)  a food sterilizer 
C)  a smoke detector 
D)  a humidifier

Question 11

Complete the following nuclear decay equation:

Accepted Answer

The answer of Complete the following nuclear decay equation:
 ...

Question 12

Henri Becquerel

Accepted Answer

A)  proposed the tiny central nucleus idea. 
B)  discovered radioactivity. 
C)  invented the particle detector tube. 
D)  discovered radium and polonium. 
E)  observed back-scattering from nuclei. 
A)  proposed the tiny central nucleus idea. 
B)  discovered radioactivity. 
C)  invented the particle detector tube. 
D)  discovered radium and polonium. 
E)  observed back-scattering from nuclei.

Question 13

Name the first three isotopes of hydrogen and their nuclide symbols, and indicate which is most common and which is most unstable.

Accepted Answer

ordinary hydrogen ¹H , deuteriu

Question 14

A gray (Gy) is

Accepted Answer

A)  the SI unit of radioactivity (= 1 decay/s). 
B)  10-2 J/kg. 
C)  a dosage of 2.58 × 10-4 C/kg. 
D)  the SI unit of absorbed dose = 1 J/kg = 100 rad. 
E)  3.70 × 1010 decays/s in radium. 
A)  the SI unit of radioactivity (= 1 decay/s). 
B)  10-2 J/kg. 
C)  a dosage of 2.58 × 10-4 C/kg. 
D)  the SI unit of absorbed dose = 1 J/kg = 100 rad. 
E)  3.70 × 1010 decays/s in radium.

Question 15

Complete the following nuclear decay equation:

Accepted Answer

The answer of Complete the following nuclear decay equation:
 ...

Question 16

The binding energy per nucleon

Accepted Answer

A)  is approximately constant throughout the periodic table, except for very light nuclei. 
B)  increases steadily as we go to heavier elements. 
C)  decreases steadily as we go to heavier elements. 
D)  has a minimum near iron in the periodic table. 
A)  is approximately constant throughout the periodic table, except for very light nuclei. 
B)  increases steadily as we go to heavier elements. 
C)  decreases steadily as we go to heavier elements. 
D)  has a minimum near iron in the periodic table.

Question 17

Which is unstable?

Accepted Answer

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

Question 18

A rad is

Accepted Answer

A)  a dosage of 2.58 × 10-4 C/kg. 
B)  the SI unit of radioactivity ( = 1 decay/s). 
C)  3.70 × 1010 decays/s in radium. 
D)  10-2 J/kg. 
E)  the SI unit of absorbed dose = 1 J/kg = 100 rad. 
A)  a dosage of 2.58 × 10-4 C/kg. 
B)  the SI unit of radioactivity ( = 1 decay/s). 
C)  3.70 × 1010 decays/s in radium. 
D)  10-2 J/kg. 
E)  the SI unit of absorbed dose = 1 J/kg = 100 rad.

Question 19

The number of protons in a neutral atom is

Accepted Answer

A)  equal to the number of neutrons. 
B)  equal to the number of electrons. 
C)  called the mass number. 
D)  the same for all elements. 
E)  zero. 
A)  equal to the number of neutrons. 
B)  equal to the number of electrons. 
C)  called the mass number. 
D)  the same for all elements. 
E)  zero.

Question 20

A radioactive substance with a half-life of 3 days has an initial activity of 0.24 Ci. What is its activity after 6 days?

Accepted Answer

A)  0.12 Ci 
B)  0.02 Ci 
C)  0.06 Ci 
D)  0.23 Ci 
E)  0.48 Ci 
A)  0.12 Ci 
B)  0.02 Ci 
C)  0.06 Ci 
D)  0.23 Ci 
E)  0.48 Ci

Exam 29: The Nucleus

When an alpha particle is emitted from an unstable nucleus, the atomic mass number of the nucleus

Marie & Pierre Curie

What are the mass number and the atomic number for each of the following: (a) beta+? (b) beta-?

What is the binding energy of the 4He nucleus?

The type of detector that requires a magnetic field to "view" charged particles is a

The normal U.S. average annual radiation dose per person is about how many REM?

J. J. Thomson

Isotopes of an element have nuclei with

The binding energy of most nuclei is proportional to

In which of the following application of technology in the home is radioactivity utilized?

Complete the following nuclear decay equation:

Henri Becquerel

Name the first three isotopes of hydrogen and their nuclide symbols, and indicate which is most common and which is most unstable.

A gray (Gy) is

Complete the following nuclear decay equation:

The binding energy per nucleon

Which is unstable?

A rad is

The number of protons in a neutral atom is

A radioactive substance with a half-life of 3 days has an initial activity of 0.24 Ci. What is its activity after 6 days?

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What is the binding energy of the ⁴He nucleus?