Question 1

Which of the following does not describe a neutron?

Accepted Answer

A) It has a positive charge equivalent but opposite of an electron's. 
B) It is much more massive than an electron. 
C) It is a nucleon. 
D) It is often associated with protons. 
E) It is more difficult to detect than a proton or an electron. 
A) It has a positive charge equivalent but opposite of an electron's. 
B) It is much more massive than an electron. 
C) It is a nucleon. 
D) It is often associated with protons. 
E) It is more difficult to detect than a proton or an electron. A

Question 2

An electron de-excites from the fourth quantum level to the third and then directly to the first.Two frequencies of light are emitted.How do their combined energies compare to the energy of the single frequency that would be emitted by de-excitation from the fourth level directly to the first level?The combined energies of the two frequencies emitted by the one electrons is

Accepted Answer

A)  greater than the energy of the single frequency. 
B)  less than the energy of the single frequency. 
C)  equal to the energy of the single frequency. 
D)  not predictable because other factors, such as the temperature of the surroundings must also be considered. 
A)  greater than the energy of the single frequency. 
B)  less than the energy of the single frequency. 
C)  equal to the energy of the single frequency. 
D)  not predictable because other factors, such as the temperature of the surroundings must also be considered. C

Question 3

How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values?

Accepted Answer

A) Electrons are only able to vibrate at particular frequencies. 
B) When an electron wave is confined,it is reinforced only at particular frequencies. 
C) The energy values of an electron only occur where its wave properties and probability clouds are mutually reinforcing. 
D) The wave model accounts for the types of orbitals an electron may occupy,not it's energy levels. 
A) Electrons are only able to vibrate at particular frequencies. 
B) When an electron wave is confined,it is reinforced only at particular frequencies. 
C) The energy values of an electron only occur where its wave properties and probability clouds are mutually reinforcing. 
D) The wave model accounts for the types of orbitals an electron may occupy,not it's energy levels. B

Question 4

Why can't we see atoms?

Accepted Answer

A) We see with light energy and the wavelength is larger than the object and so it is not reflected. 
B) Atoms are invisible. 
C) We cannot see things that are microscopic. 
D) We see with light energy but the atoms absorb all the light and therefore there are no reflections. 
E) Atoms do not interact with light energy and therefore we are unable to observe them with light. 
A) We see with light energy and the wavelength is larger than the object and so it is not reflected. 
B) Atoms are invisible. 
C) We cannot see things that are microscopic. 
D) We see with light energy but the atoms absorb all the light and therefore there are no reflections. 
E) Atoms do not interact with light energy and therefore we are unable to observe them with light.

Question 5

You could swallow a capsule of germanium,Ge (atomic number 32),without significant ill effects.If a proton were added to each germanium nucleus,however,you would not want to swallow the capsule because the germanium would

Accepted Answer

A) become arsenic. 
B) become radioactive. 
C) expand and likely lodge in your throat. 
D) have a change in flavor. 
A) become arsenic. 
B) become radioactive. 
C) expand and likely lodge in your throat. 
D) have a change in flavor.

Question 6

What is the approximate mass of a carbon atom in atomic mass units (amu)? How about a carbon dioxide molecule?

Accepted Answer

A) A carbon atom has a mass of about 12 amu.Carbon dioxide would then have a mass of 28 amu. 
B) A carbon atom has a mass of about 6 amu.Carbon dioxide would then have a mass of 32 amu. 
C) A carbon atom has a mass of about 12 amu.Carbon dioxide would then have a mass of 44 amu. 
D) A carbon atom has a mass of about 6 amu.Carbon dioxide would then have a mass of 22 amu. 
A) A carbon atom has a mass of about 12 amu.Carbon dioxide would then have a mass of 28 amu. 
B) A carbon atom has a mass of about 6 amu.Carbon dioxide would then have a mass of 32 amu. 
C) A carbon atom has a mass of about 12 amu.Carbon dioxide would then have a mass of 44 amu. 
D) A carbon atom has a mass of about 6 amu.Carbon dioxide would then have a mass of 22 amu.

Question 7

The atomic symbol represents

Accepted Answer

A) the number of electrons in an atom of an element. 
B) the name of the element. 
C) the history of the element. 
D) All of the above. 
E) Only two of the above. 
A) the number of electrons in an atom of an element. 
B) the name of the element. 
C) the history of the element. 
D) All of the above. 
E) Only two of the above.

Question 8

Which of the following is a metalloid?

Accepted Answer

A) antimony (atomic no.= 51) 
B) zinc (atomic no.= 30) 
C) iodine (atomic no.= 53) 
D) uranium (atomic no.= 92) 
E) sulfur (atomic no.= 16) 
A) antimony (atomic no.= 51) 
B) zinc (atomic no.= 30) 
C) iodine (atomic no.= 53) 
D) uranium (atomic no.= 92) 
E) sulfur (atomic no.= 16)

Question 9

Where did the atoms that make up a newborn baby originate?

Accepted Answer

A) In the womb of the baby's mother. 
B) In the digestion of the food that the mother. 
C) In the Earth through geological processes. 
D) In the explosions of ancient stars. 
A) In the womb of the baby's mother. 
B) In the digestion of the food that the mother. 
C) In the Earth through geological processes. 
D) In the explosions of ancient stars.

Question 10

If a baseball were scaled up to the size of planet Earth,each of its atoms would be about the size of

Accepted Answer

A) a baseball stadium. 
B) a flea. 
C) an atom. 
D) a ping-pong ball. 
A) a baseball stadium. 
B) a flea. 
C) an atom. 
D) a ping-pong ball.

Question 11

What happens to the properties of elements across any period of the periodic table?

Accepted Answer

A) The elements tend to become more metallic in nature since they are increasing in atomic number. 
B) The elements get much larger in size because of the addition of more protons and electrons. 
C) The properties of the elements gradually change across any period of the periodic table. 
D) All of the above are true. 
A) The elements tend to become more metallic in nature since they are increasing in atomic number. 
B) The elements get much larger in size because of the addition of more protons and electrons. 
C) The properties of the elements gradually change across any period of the periodic table. 
D) All of the above are true.

Question 12

Why are the atomic masses listed in the periodic table not whole numbers?

Accepted Answer

A) Scientists have yet to make the precise measurements. 
B) That would be too much of a coincidence. 
C) The atomic masses are average atomic masses. 
D) Today's instruments are able to measure the atomic masses to many decimal places. 
A) Scientists have yet to make the precise measurements. 
B) That would be too much of a coincidence. 
C) The atomic masses are average atomic masses. 
D) Today's instruments are able to measure the atomic masses to many decimal places.

Question 13

The element bromine,Br (atomic number 35),has two major isotopes of similar abundance,both around 50 percent.The atomic mass of bromine is reported in the periodic table as 79.904 atomic mass units.Choose the most likely set of mass numbers for these two bromine isotopes.

Accepted Answer

A) Br-80,Br-81 
B) Br-79,Br-80 
C) Br-79,Br-81 
D) Br-78,Br-80 
A) Br-80,Br-81 
B) Br-79,Br-80 
C) Br-79,Br-81 
D) Br-78,Br-80

Question 14

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.

Accepted Answer

A) group 
B) period 
C) textbook 
D) compound 
E) row 
A) group 
B) period 
C) textbook 
D) compound 
E) row

Question 15

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 16

What does the following element description actually mean? iron-57

Accepted Answer

A) iron with a mass number of 57 
B) iron with an atomic number of 57 
C) iron with 57 protons 
D) iron with 57 neutrons 
E) 57 iron atoms 
A) iron with a mass number of 57 
B) iron with an atomic number of 57 
C) iron with 57 protons 
D) iron with 57 neutrons 
E) 57 iron atoms

Question 17

In what sense can you truthfully say that you are a part of every person around you?

Accepted Answer

A) We all live on the same planet and share the same resources. 
B) We are continually exchanging our atoms. 
C) We all share the same genetic code. 
D) There are more people alive now than have ever lived. 
A) We all live on the same planet and share the same resources. 
B) We are continually exchanging our atoms. 
C) We all share the same genetic code. 
D) There are more people alive now than have ever lived.

Question 18

Which element would have chemical properties the most similar to chlorine (Cl)?

Accepted Answer

A) Br 
B) O 
C) Ar 
D) S 
E) Na 
A) Br 
B) O 
C) Ar 
D) S 
E) Na

Question 19

What does the following element description actually mean? $\begin{array} { c } 
238 \
92
\end{array}$ 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 20

Which of the following elements will most likely be shiny and malleable?

Accepted Answer

A) rhodium (Rh) 
B) hydrogen (H) 
C) helenium (Se) 
D) iodine (I) 
E) silicon (Si) 
A) rhodium (Rh) 
B) hydrogen (H) 
C) helenium (Se) 
D) iodine (I) 
E) silicon (Si)

Exam 12: Atoms and the Periodic Table

Which of the following does not describe a neutron?

How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can have only discrete energy values?

Why can't we see atoms?

You could swallow a capsule of germanium,Ge (atomic number 32),without significant ill effects.If a proton were added to each germanium nucleus,however,you would not want to swallow the capsule because the germanium would

What is the approximate mass of a carbon atom in atomic mass units (amu)? How about a carbon dioxide molecule?

The atomic symbol represents

Which of the following is a metalloid?

Where did the atoms that make up a newborn baby originate?

If a baseball were scaled up to the size of planet Earth,each of its atoms would be about the size of

What happens to the properties of elements across any period of the periodic table?

Why are the atomic masses listed in the periodic table not whole numbers?

The element bromine,Br (atomic number 35),has two major isotopes of similar abundance,both around 50 percent.The atomic mass of bromine is reported in the periodic table as 79.904 atomic mass units.Choose the most likely set of mass numbers for these two bromine isotopes.

Elements that are in the same ________ have a tendency to have very similar chemical properties due to periodic trends.

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

What does the following element description actually mean? iron-57

In what sense can you truthfully say that you are a part of every person around you?

Which element would have chemical properties the most similar to chlorine (Cl)?

What does the following element description actually mean? 238 92 U

Which of the following elements will most likely be shiny and malleable?

Patterns of Motion and Equilibrium

Newtons Laws of Motion

Momentum and Energy

Gravity, Projectiles, and Satellites

Fluid Mechanics

Thermal Energy and Thermodynamics

Heat Transfer and Change of Phase

Static and Current Electricity

Magnetism and Electromagnetic Induction

Waves and Sound

Light

The Atomic Nucleus and Radioactivity

Elements of Chemistry

How Atoms Bond and Molecules Attract

Mixtures

How Chemicals React

Two Classes of Chemical Reactions

Organic Compounds

Rocks and Minerals

Plate Tectonics and Earths Interior

Shaping Earths Surface

Geologic Time - Reading the Rock Record

The Oceans, Atmosphere, and Climatic Effects

Driving Forces of Weather

The Solar System

Stars and Galaxies

The Structure of Space and Time

Prologue: The Nature of Science

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