Question 1

A particle never emitted in beta decay is the

Accepted Answer

A)  neutron. 
B)  neutrino. 
C)  electron. 
D)  positron. 
A)  neutron. 
B)  neutrino. 
C)  electron. 
D)  positron.

Question 2

The product of the gamma decay of the strontium isotope   is

Accepted Answer

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

Question 3

The mass of a positron is

Accepted Answer

A)  equal to the mass of an electron. 
B)  more than the mass of an electron but less than the mass of a proton. 
C)  equal to the mass of a proton. 
D)  more than the mass of a proton. 
A)  equal to the mass of an electron. 
B)  more than the mass of an electron but less than the mass of a proton. 
C)  equal to the mass of a proton. 
D)  more than the mass of a proton.

Question 4

The most important single source of radiation dosage received by an average person in the United States is

Accepted Answer

A)  medical x-rays 
B)  nuclear reactors. 
C)  radon. 
D)  radium. 
A)  medical x-rays 
B)  nuclear reactors. 
C)  radon. 
D)  radium.

Question 5

By far the most dangerous diagnostic x-rays in medicine are

Accepted Answer

A)  dental x-rays. 
B)  chest x-rays. 
C)  CT scans. 
D)  mammograms. 
A)  dental x-rays. 
B)  chest x-rays. 
C)  CT scans. 
D)  mammograms.

Question 6

A nucleus with too few neutrons for stability may decay radioactively with the emission of

Accepted Answer

A)  a neutron. 
B)  a proton. 
C)  an electron. 
D)  a positron. 
A)  a neutron. 
B)  a proton. 
C)  an electron. 
D)  a positron.

Question 7

Which of the following is not an isotope of hydrogen?

Accepted Answer

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

Question 8

The number of protons in the nucleus   is

Accepted Answer

A)  4. 
B)  5. 
C)  9. 
D)  13. 
A)  4. 
B)  5. 
C)  9. 
D)  13.

Question 9

The atomic number of the nucleus   is

Accepted Answer

A)  4. 
B)  5. 
C)  9. 
D)  13. 
A)  4. 
B)  5. 
C)  9. 
D)  13.

Question 10

Most known nuclides

Accepted Answer

A)  are stable. 
B)  are radioactive. 
C)  can undergo fission. 
D)  have more nuclear mass than the total mass of their constituent nucleons. 
A)  are stable. 
B)  are radioactive. 
C)  can undergo fission. 
D)  have more nuclear mass than the total mass of their constituent nucleons.

Question 11

After 2 h has elapsed, one-sixteenth of the original quantity of a certain radionuclide remains undecayed. The half-life of this radionuclide is

Accepted Answer

A)  15 min. 
B)  30 min. 
C)  45 min. 
D)  60 min. 
A)  15 min. 
B)  30 min. 
C)  45 min. 
D)  60 min.

Question 12

Slightly enriched uranium can be the energy source of which of the following?

Accepted Answer

A)  Nuclear fission reactors. 
B)  Nuclear fusion reactors. 
C)  Nuclear weapons. 
D)  X-rays 
A)  Nuclear fission reactors. 
B)  Nuclear fusion reactors. 
C)  Nuclear weapons. 
D)  X-rays

Question 13

A possible fuel for a fusion reactor is

Accepted Answer

A)   
B)   
C)  plutonium. 
D)  tritium. 
A)   
B)   
C)  plutonium. 
D)  tritium.

Question 14

The nucleus of a helium atom is called

Accepted Answer

A)  an alpha particle. 
B)  a beta particle. 
C)  a gamma ray. 
D)  a quark. 
A)  an alpha particle. 
B)  a beta particle. 
C)  a gamma ray. 
D)  a quark.

Question 15

As a sample of a radioactive nuclide decays, its half-life

Accepted Answer

A)  decreases. 
B)  remains the same. 
C)  increases. 
D)  Any of these choices could be correct, depending upon the nuclide. 
A)  decreases. 
B)  remains the same. 
C)  increases. 
D)  Any of these choices could be correct, depending upon the nuclide.

Question 16

The half-life of tritium is 12.5 years. If we start out with 1 g of tritium, after 25 years there will be

Accepted Answer

A)  no tritium left. 
B)  1/4 g of tritium left. 
C)  1/2 g of tritium left. 
D)  a total of 4 g of tritium. 
A)  no tritium left. 
B)  1/4 g of tritium left. 
C)  1/2 g of tritium left. 
D)  a total of 4 g of tritium.

A particle never emitted in beta decay is the

The product of the gamma decay of the strontium isotope is

The mass of a positron is

The most important single source of radiation dosage received by an average person in the United States is

By far the most dangerous diagnostic x-rays in medicine are

A nucleus with too few neutrons for stability may decay radioactively with the emission of

Which of the following is not an isotope of hydrogen?

The number of protons in the nucleus is

The atomic number of the nucleus is

Most known nuclides

After 2 h has elapsed, one-sixteenth of the original quantity of a certain radionuclide remains undecayed. The half-life of this radionuclide is

Slightly enriched uranium can be the energy source of which of the following?

A possible fuel for a fusion reactor is

The nucleus of a helium atom is called

As a sample of a radioactive nuclide decays, its half-life

The half-life of tritium is 12.5 years. If we start out with 1 g of tritium, after 25 years there will be

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Exam 8: The Nucleus

A particle never emitted in beta decay is the

The product of the gamma decay of the strontium isotope is

The mass of a positron is

The most important single source of radiation dosage received by an average person in the United States is

By far the most dangerous diagnostic x-rays in medicine are

A nucleus with too few neutrons for stability may decay radioactively with the emission of

Which of the following is not an isotope of hydrogen?

The number of protons in the nucleus is

The atomic number of the nucleus is

Most known nuclides

After 2 h has elapsed, one-sixteenth of the original quantity of a certain radionuclide remains undecayed. The half-life of this radionuclide is

Slightly enriched uranium can be the energy source of which of the following?

A possible fuel for a fusion reactor is

The nucleus of a helium atom is called

As a sample of a radioactive nuclide decays, its half-life

The half-life of tritium is 12.5 years. If we start out with 1 g of tritium, after 25 years there will be

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Atom

The Periodic Law

Crystals, Ions, and Solutions

Chemical Reactions

Organic Chemistry

Atmosphere and Hydrosphere

The Rock Cycle

The Evolving Earth

The Solar System

The Stars

The Universe Galaxies

Filters