Question 1

Photons have

Accepted Answer

A)  no charge. 
B)  charges smaller than ±e, like quarks. 
C)  charges of ±e. 
D)  charges whose magnitudes depends on their speeds. 
A)  no charge. 
B)  charges smaller than ±e, like quarks. 
C)  charges of ±e. 
D)  charges whose magnitudes depends on their speeds.

Question 2

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Accepted Answer

A)  1. 
B)  2. 
C)  3. 
D)  4. 
A)  1. 
B)  2. 
C)  3. 
D)  4.

Question 3

Which of these statements is true for the radiation emitted by all objects?

Accepted Answer

A)  Under the same circumstances, black objects emit the least radiation. 
B)  The higher an object's temperature, the longer the predominant wavelength of its radiation. 
C)  The higher an object's temperature, the more radiation it emits. 
D)  The higher an object's temperature, the higher the speed of the radiation it emits. 
A)  Under the same circumstances, black objects emit the least radiation. 
B)  The higher an object's temperature, the longer the predominant wavelength of its radiation. 
C)  The higher an object's temperature, the more radiation it emits. 
D)  The higher an object's temperature, the higher the speed of the radiation it emits.

Question 4

When light is directed at a metal surface, the emitted electrons

Accepted Answer

A)  are called photons. 
B)  have random energies. 
C)  have energies that depend upon the intensity of the light. 
D)  have energies that depend upon the frequency of the light. 
A)  are called photons. 
B)  have random energies. 
C)  have energies that depend upon the intensity of the light. 
D)  have energies that depend upon the frequency of the light.

Question 5

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

Accepted Answer

A)  10-8 s. 
B)  1 s. 
C)  10 s. 
D)  1 min. 
A)  10-8 s. 
B)  1 s. 
C)  10 s. 
D)  1 min.

Photons have

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Which of these statements is true for the radiation emitted by all objects?

When light is directed at a metal surface, the emitted electrons

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

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Exam 9: The Atom

Photons have

The number of quantum numbers needed to determine the size and shape of an atomic orbital is

Which of these statements is true for the radiation emitted by all objects?

When light is directed at a metal surface, the emitted electrons

An atom in an excited state usually emits a photon and falls to a state of lower energy m about

The Scientific Method

Motion

Energy

Energy and the Future

Matter and Heat

Electricity and Magnetism

Waves

The Nucleus

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