Question 1

From which of the following atoms would removing an electron be the most difficult?

Accepted Answer

A)  Rb 
B)  Sr 
C)  Cd 
D)  I 
E)  Xe 
A)  Rb 
B)  Sr 
C)  Cd 
D)  I 
E)  Xe

Question 2

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

Accepted Answer

A)  Absorption of light shows wave behavior while bending of light shows particle behavior. 
B)  Absorption of light shows particle behavior while bending of light shows wave behavior. 
C)  Both absorption and bending of light show particle behavior. 
D)  Both absorption and bending of light show wave behavior. 
A)  Absorption of light shows wave behavior while bending of light shows particle behavior. 
B)  Absorption of light shows particle behavior while bending of light shows wave behavior. 
C)  Both absorption and bending of light show particle behavior. 
D)  Both absorption and bending of light show wave behavior.

Question 3

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

Accepted Answer

A)  52 
B)  26 
C)  24 
D)  none 
A)  52 
B)  26 
C)  24 
D)  none

Question 4

How is it possible to deduce the identity of an element from its electron configuration?

Accepted Answer

A)  The number of occupied shells corresponds to the atom's atomic number. 
B)  If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. 
C)  Using the periodic table, the outermost occupied shell indicates the group while the number of occupied shells indicates the period. 
D)  An electron configuration is unique to each element, much like its atomic spectrum. 
A)  The number of occupied shells corresponds to the atom's atomic number. 
B)  If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. 
C)  Using the periodic table, the outermost occupied shell indicates the group while the number of occupied shells indicates the period. 
D)  An electron configuration is unique to each element, much like its atomic spectrum.

Question 5

Thousands of magnetic marbles are thrown into a vertically oriented wind tunnel. As they are thrown, no marbles are free from other marbles. Instead, they clump together in groups of varying numbers. The wind tunnel operator is able to control the upward force of the wind so as to make clumps of marbles hover. She records the various forces of wind required to maintain hovering clumps in units of ounces: 45, 30, 60, 75, 105, 35, 80, 55, 90, 20, 65. From this data, what might be the weight of a single magnetic marble? What is the force of the wind analogous to within Millikan's experiment?

Accepted Answer

A)  3 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment. 
B)  3 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment. 
C)  5 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment. 
D)  5 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment. 
A)  3 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment. 
B)  3 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment. 
C)  5 ounces; the force of the wind is analogous to the force of gravity within Millikan's experiment. 
D)  5 ounces; the force of the wind is analogous to the strength of the electric field within Millikan's experiment.

Question 6

Consider the various frequencies of the three photons emitted from the following three individual electron transitions in the figure below: n=3 to n=2; n=2 to n=1; n=3 to n=1. These transitions would produce three spectral lines in a spectroscope. If the energy spacing between the levels were equal, would this affect the number of spectral lines?

Accepted Answer

A)  Yes, two otherwise separate lines would converge into a single more intense line. 
B)  No, but the spacing between the spectral lines would change. 
C)  Yes, two otherwise separate lines would converge into a single less intense line. 
D)  No, but some would then require a prism in order to be seen. 
A)  Yes, two otherwise separate lines would converge into a single more intense line. 
B)  No, but the spacing between the spectral lines would change. 
C)  Yes, two otherwise separate lines would converge into a single less intense line. 
D)  No, but some would then require a prism in order to be seen.

Question 7

Which of the following statements is true about Bohr's planetary model of the atom?

Accepted Answer

A)  The electrons orbit around the nucleus. 
B)  It is a physical model. 
C)  The energy difference between the orbits is continuous. 
D)  The electrons smoothly move from one orbit to the next. 
E)  none of the above 
A)  The electrons orbit around the nucleus. 
B)  It is a physical model. 
C)  The energy difference between the orbits is continuous. 
D)  The electrons smoothly move from one orbit to the next. 
E)  none of the above

Question 8

What does the following element description actually mean?   U

Accepted Answer

A)  a uranium atom with 92 protons and 146 neutrons 
B)  a uranium atom with 238 neutrons and 92 protons 
C)  a uranium atom with 92 neutrons and 238 protons 
D)  a uranium atom with 92 neutrons and 146 protons 
E)  none of the above 
A)  a uranium atom with 92 protons and 146 neutrons 
B)  a uranium atom with 238 neutrons and 92 protons 
C)  a uranium atom with 92 neutrons and 238 protons 
D)  a uranium atom with 92 neutrons and 146 protons 
E)  none of the above

Question 9

Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit?

Accepted Answer

A)  three 
B)  four 
C)  six 
D)  unlimited 
A)  three 
B)  four 
C)  six 
D)  unlimited

Question 10

In some instances electromagnetic radiation behaves like a wave. In other instances electromagnetic radiation behaves more like a particle. Which behavior more accurately describes the true nature of electromagnetic radiation?

Accepted Answer

A)  Particle behavior more accurately describes the true nature of electromagnetic radiation. 
B)  Electromagnetic radiation behaves both as a wave or as a particle depending on the circumstance. 
C)  Wave behavior more accurately describes the true nature of electromagnetic radiation. 
D)  There is no circumstance in which electromagnetic radiation can be described as either portraying particle or wave behavior. 
A)  Particle behavior more accurately describes the true nature of electromagnetic radiation. 
B)  Electromagnetic radiation behaves both as a wave or as a particle depending on the circumstance. 
C)  Wave behavior more accurately describes the true nature of electromagnetic radiation. 
D)  There is no circumstance in which electromagnetic radiation can be described as either portraying particle or wave behavior.

Question 11

Would you use a physical model or a conceptual model to describe the following: the brain; the mind; the solar system; the beginning of the universe?

Accepted Answer

A)  conceptual; physical; conceptual physical 
B)  conceptual; conceptual; conceptual; conceptual 
C)  physical; conceptual; physical; conceptual 
D)  physical; physical; physical; physical 
A)  conceptual; physical; conceptual physical 
B)  conceptual; conceptual; conceptual; conceptual 
C)  physical; conceptual; physical; conceptual 
D)  physical; physical; physical; physical

Question 12

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

Accepted Answer

A)  1 ounce in an upward direction. 
B)  2 ounces in an upward direction. 
C)  1 ounce in an downward direction. 
D)  2 ounces in an downward direction. 
A)  1 ounce in an upward direction. 
B)  2 ounces in an upward direction. 
C)  1 ounce in an downward direction. 
D)  2 ounces in an downward direction.

Question 13

Which of the above has the highest wavelength?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  e 
A)  a 
B)  b 
C)  c 
D)  d 
E)  e

Question 14

Does a shell have to contain electrons in order to exist?

Accepted Answer

A)  A shell is a form of energy that requires electrons in order to exist. 
B)  A shell is just a region of space which may or may not contain electrons. 
C)  A shell is just a conceptual model, hence, it doesn't really exist with or without the electron. 
D)  Two of the above are reasonable answers. 
A)  A shell is a form of energy that requires electrons in order to exist. 
B)  A shell is just a region of space which may or may not contain electrons. 
C)  A shell is just a conceptual model, hence, it doesn't really exist with or without the electron. 
D)  Two of the above are reasonable answers.

Question 15

The energy level diagram ranks orbitals by their ________.

Accepted Answer

A)  sizes 
B)  complexity 
C)  electron capacities 
D)  average distance from the nucleus 
A)  sizes 
B)  complexity 
C)  electron capacities 
D)  average distance from the nucleus

Question 16

How is it possible for an atom to emit visible light even though the atom is smaller than the wavelength of visible light?

Accepted Answer

A)  It's not possible. If a single atom emitted visible light, an atom would be visible under a high powered microscope. 
B)  Any charged object, including the smallest atom, generates electromagnetic waves as it vibrates, which we observe in the visible spectrum of an element. 
C)  As the electrons from an atom are excited, some of them reach escape velocity thus leaving the sphere of influence of the nucleus. These photons are observed in the visible spectrum. 
D)  An atom does not emit light in the visible range of the spectrum, only in the UV wavelength range, since ultraviolet light wavelengths are smaller than atoms. 
A)  It's not possible. If a single atom emitted visible light, an atom would be visible under a high powered microscope. 
B)  Any charged object, including the smallest atom, generates electromagnetic waves as it vibrates, which we observe in the visible spectrum of an element. 
C)  As the electrons from an atom are excited, some of them reach escape velocity thus leaving the sphere of influence of the nucleus. These photons are observed in the visible spectrum. 
D)  An atom does not emit light in the visible range of the spectrum, only in the UV wavelength range, since ultraviolet light wavelengths are smaller than atoms.

Question 17

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  b and c 
A)  a 
B)  b 
C)  c 
D)  d 
E)  b and c

Question 18

The ray of light within a neon sign bends when a magnet is held up to it because ________.

Accepted Answer

A)  neon, like iron, is attracted to magnets 
B)  the light arises from the flow of electron within the tube 
C)  magnetic fields are able to pass through glass 
D)  impurities within the neon plasma are attracted to the magnet 
A)  neon, like iron, is attracted to magnets 
B)  the light arises from the flow of electron within the tube 
C)  magnetic fields are able to pass through glass 
D)  impurities within the neon plasma are attracted to the magnet

Question 19

The electron configuration of any neutral group 1 element always ends with ________.

Accepted Answer

A)  s1 
B)  d10 
C)  s2 
D)  p1 
A)  s1 
B)  d10 
C)  s2 
D)  p1

Question 20

Rank the following by relative frequency from highest to lowest:

Accepted Answer

A)  gamma rays, blue light, red light, radio waves 
B)  gamma rays, radio waves, blue light, red light 
C)  radio waves, red light, blue light, gamma rays 
D)  blue light, red light, radio waves, gamma rays 
E)  red light, radio waves, blue light, gamma rays 
A)  gamma rays, blue light, red light, radio waves 
B)  gamma rays, radio waves, blue light, red light 
C)  radio waves, red light, blue light, gamma rays 
D)  blue light, red light, radio waves, gamma rays 
E)  red light, radio waves, blue light, gamma rays

From which of the following atoms would removing an electron be the most difficult?

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

How is it possible to deduce the identity of an element from its electron configuration?

Which of the following statements is true about Bohr's planetary model of the atom?

What does the following element description actually mean? U

Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit?

In some instances electromagnetic radiation behaves like a wave. In other instances electromagnetic radiation behaves more like a particle. Which behavior more accurately describes the true nature of electromagnetic radiation?

Would you use a physical model or a conceptual model to describe the following: the brain; the mind; the solar system; the beginning of the universe?

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

Which of the above has the highest wavelength?

Does a shell have to contain electrons in order to exist?

The energy level diagram ranks orbitals by their ________.

How is it possible for an atom to emit visible light even though the atom is smaller than the wavelength of visible light?

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

The ray of light within a neon sign bends when a magnet is held up to it because ________.

The electron configuration of any neutral group 1 element always ends with ________.

Rank the following by relative frequency from highest to lowest:

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Exam 4: Subatomic Particles

From which of the following atoms would removing an electron be the most difficult?

An atom absorbs or emits only particular frequencies of light. White light bends into a glass prism and separates into a rainbow of colors. In which of these two scenarios does the electromagnetic radiation behave as a wave? As a particle?

The nucleus of an electrically neutral iron atom contains 26 protons. How many electrons does this iron atom have?

How is it possible to deduce the identity of an element from its electron configuration?

Which of the following statements is true about Bohr's planetary model of the atom?

What does the following element description actually mean? U

Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possible, how many spectral lines will this atom exhibit?

In some instances electromagnetic radiation behaves like a wave. In other instances electromagnetic radiation behaves more like a particle. Which behavior more accurately describes the true nature of electromagnetic radiation?

Would you use a physical model or a conceptual model to describe the following: the brain; the mind; the solar system; the beginning of the universe?

A one ounce Ping-Pong ball is pushed upwards by a fan so that the Ping-Pong ball hovers neither rising nor falling. What is the force of the wind on the Ping-Pong ball in units of ounces?

Which of the above has the highest wavelength?

Does a shell have to contain electrons in order to exist?

The energy level diagram ranks orbitals by their ________.

How is it possible for an atom to emit visible light even though the atom is smaller than the wavelength of visible light?

In the following diagram, which of the following measurements would represent the distance the wave travels in 1 second if it has a frequency of 0.5 Hz?

The ray of light within a neon sign bends when a magnet is held up to it because ________.

The electron configuration of any neutral group 1 element always ends with ________.

Rank the following by relative frequency from highest to lowest:

About Science

Particles of Matter

Elements of Chemistry

The Atomic Nucleus

How Atoms Bond

How Molecules Mix

How Water Behaves

How Chemicals React

Acids and Bases in Our Environment

Oxidations and Reductions Charge the World

Organic Compounds

Nutrients of Life

Medicinal Chemistry

Optimizing Food Production

Protection Water and Air Resources

Capturing Energy

Filters