Question 1

The half-life of a certain radioactive isotope is 6 h.If we start out with 10 g of the isotope, after 1 day there will be

Accepted Answer

A) none left. 
B) 0.625 g left. 
C) 1.6 g left. 
D) 2.5 g left. 
A) none left. 
B) 0.625 g left. 
C) 1.6 g left. 
D) 2.5 g left.

Question 2

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 3

If radium and chlorine combine to form radium chloride, the compound is

Accepted Answer

A) no longer radioactive. 
B) half as radioactive as its radium content. 
C) as radioactive as its radium content. 
D) twice as radioactive as its radium content. 
A) no longer radioactive. 
B) half as radioactive as its radium content. 
C) as radioactive as its radium content. 
D) twice as radioactive as its radium content.

Question 4

The number of protons in a stable nucleus is always

Accepted Answer

A) less than the number of neutrons. 
B) less than or equal to the number of neutrons. 
C) equal to or more than the number of neutrons. 
D) more than the number of neutrons. 
A) less than the number of neutrons. 
B) less than or equal to the number of neutrons. 
C) equal to or more than the number of neutrons. 
D) more than the number of neutrons.

Question 5

When a nucleus of the copper isotope   captures an electron, it becomes

Accepted Answer

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

Question 6

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 7

A method of compressing fuel for a nuclear fusion reactor that is not being studied uses

Accepted Answer

A) laser beams. 
B) steady magnetic fields. 
C) momentary magnetic fields. 
D) hydraulic rams. 
A) laser beams. 
B) steady magnetic fields. 
C) momentary magnetic fields. 
D) hydraulic rams.

Question 8

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 9

In a nuclear power plant, the nuclear reactor itself is used to supply

Accepted Answer

A) neutrons. 
B) electricity. 
C) radioactivity. 
D) heat. 
A) neutrons. 
B) electricity. 
C) radioactivity. 
D) heat.

Question 10

Quarks are not present in

Accepted Answer

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

Question 11

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 12

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 13

The interaction responsible for the structure of atoms, molecules, liquids, and solids is the

Accepted Answer

A) gravitational interaction. 
B) strong interaction. 
C) weak interaction. 
D) electromagnetic interaction. 
A) gravitational interaction. 
B) strong interaction. 
C) weak interaction. 
D) electromagnetic interaction.

Question 14

A molecule of heavy water contains

Accepted Answer

A) two oxygen atoms instead of one. 
B) three hydrogen atoms instead of two. 
C) deuterium atoms instead of hydrogen atoms. 
D) a deuterium atom instead of an oxygen atom. 
A) two oxygen atoms instead of one. 
B) three hydrogen atoms instead of two. 
C) deuterium atoms instead of hydrogen atoms. 
D) a deuterium atom instead of an oxygen atom.

Question 15

Of the following particles, the one with the smallest mass is the

Accepted Answer

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

Question 16

The atomic number of an element determines its

Accepted Answer

A) mass. 
B) binding energy. 
C) number of neutrons. 
D) chemical behavior. 
A) mass. 
B) binding energy. 
C) number of neutrons. 
D) chemical behavior.

Question 17

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 18

The strongest of the fundamental interactions is the

Accepted Answer

A) gravitational interaction. 
B) strong interaction. 
C) weak interaction. 
D) electromagnetic interaction. 
A) gravitational interaction. 
B) strong interaction. 
C) weak interaction. 
D) electromagnetic interaction.

Question 19

The product of the gamma decay of the strontium isotope   is

Accepted Answer

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

Question 20

Of the following particles, the one with the greatest mass is the

Accepted Answer

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

The half-life of a certain radioactive isotope is 6 h.If we start out with 10 g of the isotope, after 1 day there will be

The nucleus of a helium atom is called

If radium and chlorine combine to form radium chloride, the compound is

The number of protons in a stable nucleus is always

When a nucleus of the copper isotope captures an electron, it becomes

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

A method of compressing fuel for a nuclear fusion reactor that is not being studied uses

The mass of a positron is

In a nuclear power plant, the nuclear reactor itself is used to supply

Quarks are not present in

The electromagnetic waves emitted by a nucleus are called

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

The interaction responsible for the structure of atoms, molecules, liquids, and solids is the

A molecule of heavy water contains

Of the following particles, the one with the smallest mass is the

The atomic number of an element determines its

Most known nuclides

The strongest of the fundamental interactions is the

The product of the gamma decay of the strontium isotope is

Of the following particles, the one with the greatest mass is the

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Exam 8: The Nucleus

The half-life of a certain radioactive isotope is 6 h.If we start out with 10 g of the isotope, after 1 day there will be

The nucleus of a helium atom is called

If radium and chlorine combine to form radium chloride, the compound is

The number of protons in a stable nucleus is always

When a nucleus of the copper isotope captures an electron, it becomes

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

A method of compressing fuel for a nuclear fusion reactor that is not being studied uses

The mass of a positron is

In a nuclear power plant, the nuclear reactor itself is used to supply

Quarks are not present in

The electromagnetic waves emitted by a nucleus are called

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

The interaction responsible for the structure of atoms, molecules, liquids, and solids is the

A molecule of heavy water contains

Of the following particles, the one with the smallest mass is the

The atomic number of an element determines its

Most known nuclides

The strongest of the fundamental interactions is the

The product of the gamma decay of the strontium isotope is

Of the following particles, the one with the greatest mass is the

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

Universe

Filters