Question 1

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 2

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 3

A possible fuel for a fusion reactor is

Accepted Answer

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

Question 4

The electromagnetic interaction is

Accepted Answer

A) the fundamental interaction with the shortest range. 
B) responsible for the structures of atoms, molecules, liquids, and solids. 
C) responsible for holding nucleons together to form nuclei. 
D) responsible for radioactive decays. 
A) the fundamental interaction with the shortest range. 
B) responsible for the structures of atoms, molecules, liquids, and solids. 
C) responsible for holding nucleons together to form nuclei. 
D) responsible for radioactive decays.

Question 5

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 6

All known charged particles have electric charges that are multiples of $\pm$e except for

Accepted Answer

A) electrons. 
B) positrons. 
C) protons. 
D) quarks. 
A) electrons. 
B) positrons. 
C) protons. 
D) quarks.

Question 7

The moderator in a nuclear reactor

Accepted Answer

A) slows down neutrons emitted during fission. 
B) reduces the production of plutonium. 
C) reduces the production of radiation. 
D) prevents explosions. 
A) slows down neutrons emitted during fission. 
B) reduces the production of plutonium. 
C) reduces the production of radiation. 
D) prevents explosions.

Question 8

The product of the alpha decay of the uranium isotope   is

Accepted Answer

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

Question 9

The radiation dosage due to cosmic rays is greatest

Accepted Answer

A) in orbiting spacecraft. 
B) in airplanes at high altitudes. 
C) at sea level. 
D) underground. 
A) in orbiting spacecraft. 
B) in airplanes at high altitudes. 
C) at sea level. 
D) underground.

Question 10

The bismuth isotope,   decays into the polonium isotope   by

Accepted Answer

A) emitting an electron. 
B) capturing an electron. 
C) emitting a positron. 
D) emitting an alpha particle. 
A) emitting an electron. 
B) capturing an electron. 
C) emitting a positron. 
D) emitting an alpha particle.

Question 11

The atomic number of a nucleus decreases when it emits

Accepted Answer

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

Question 12

The electromagnetic waves emitted by a nucleus are called

Accepted Answer

A) ultraviolet rays. 
B) X-rays. 
C) gamma rays. 
D) quarks. 
A) ultraviolet rays. 
B) X-rays. 
C) gamma rays. 
D) quarks.

Question 13

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 14

Quarks are not present in

Accepted Answer

A) electrons. 
B) protons. 
C) neutrons. 
D) hadrons. 
A) electrons. 
B) protons. 
C) neutrons. 
D) hadrons.

Question 15

The number of neutrons in the nucleus   is

Accepted Answer

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

Question 16

The atoms of the isotopes of a given element have the same number of

Accepted Answer

A) protons. 
B) neutrons. 
C) nucleons. 
D) nuclides. 
A) protons. 
B) neutrons. 
C) nucleons. 
D) nuclides.

Question 17

Which one or more of the following statements is true in general?

Accepted Answer

A) Alpha particles are more able to penetrate matter than beta particles and gamma rays. 
B) Alpha particles are less able to penetrate matter than beta particles and gamma rays. 
C) Alpha particles are less able to penetrate matter than beta particles but more able to do so than gamma rays. 
D) Alpha particles are more able to penetrate matter than beta particles but less able to do so than gamma rays. 
A) Alpha particles are more able to penetrate matter than beta particles and gamma rays. 
B) Alpha particles are less able to penetrate matter than beta particles and gamma rays. 
C) Alpha particles are less able to penetrate matter than beta particles but more able to do so than gamma rays. 
D) Alpha particles are more able to penetrate matter than beta particles but less able to do so than gamma rays.

Question 18

Enriched uranium contains

Accepted Answer

A) more   than natural uranium. 
B) more   than natural uranium. 
C) plutonium. 
D) tritium. 
A) more   than natural uranium. 
B) more   than natural uranium. 
C) plutonium. 
D) tritium.

Question 19

When a nucleus undergoes radioactive decay, its new mass number is

Accepted Answer

A) always less than its original mass number. 
B) always more than its original mass number. 
C) never less than its original mass number. 
D) never more than its original mass number. 
A) always less than its original mass number. 
B) always more than its original mass number. 
C) never less than its original mass number. 
D) never more than its original mass number.

Question 20

Nuclear fission and fusion reactions give off energy because

Accepted Answer

A) the binding energy per nucleon is least for nuclei of intermediate size. 
B) the binding energy per nucleon is greatest for nuclei of intermediate size. 
C) they result in the production of neutrons. 
D) they result in the production of plutonium. 
A) the binding energy per nucleon is least for nuclei of intermediate size. 
B) the binding energy per nucleon is greatest for nuclei of intermediate size. 
C) they result in the production of neutrons. 
D) they result in the production of plutonium.

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 electromagnetic interaction is

Most known nuclides

All known charged particles have electric charges that are multiples of $\pm$ e except for

The moderator in a nuclear reactor

The product of the alpha decay of the uranium isotope is

The radiation dosage due to cosmic rays is greatest

The bismuth isotope, decays into the polonium isotope by

The atomic number of a nucleus decreases when it emits

The electromagnetic waves emitted by a nucleus are called

The nucleus of a helium atom is called

Quarks are not present in

The number of neutrons in the nucleus is

The atoms of the isotopes of a given element have the same number of

Which one or more of the following statements is true in general?

Enriched uranium contains

When a nucleus undergoes radioactive decay, its new mass number is

Nuclear fission and fusion reactions give off energy because

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

Filters

Exam 8: The Nucleus

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 electromagnetic interaction is

Most known nuclides

All known charged particles have electric charges that are multiples of ±\pm± e except for

The moderator in a nuclear reactor

The product of the alpha decay of the uranium isotope is

The radiation dosage due to cosmic rays is greatest

The bismuth isotope, decays into the polonium isotope by

The atomic number of a nucleus decreases when it emits

The electromagnetic waves emitted by a nucleus are called

The nucleus of a helium atom is called

Quarks are not present in

The number of neutrons in the nucleus is

The atoms of the isotopes of a given element have the same number of

Which one or more of the following statements is true in general?

Enriched uranium contains

When a nucleus undergoes radioactive decay, its new mass number is

Nuclear fission and fusion reactions give off energy because

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

Filters

All known charged particles have electric charges that are multiples of $\pm$ e except for