Question 1

Which of the following elements is in the fourth period?

Accepted Answer

A) chromium (Cr) 
B) hydrogen (H) 
C) beryllium(Be) 
D) carbon (
C)  
E) zirconium (Zr) 
A) chromium (Cr) 
B) hydrogen (H) 
C) beryllium(Be) 
D) carbon (
C)  
E) zirconium (Zr)

Question 2

A practical application of the wave nature of electrons is the

Accepted Answer

A) message chair. 
B) electron microscope. 
C) hologram. 
D) scanning tunneling microscope. 
A) message chair. 
B) electron microscope. 
C) hologram. 
D) scanning tunneling microscope.

Question 3

What property of an electron makes it possible to use electron microscopes?

Accepted Answer

A) They can be focused using smaller lenses. 
B) They have shorter wavelengths than visible light. 
C) They are electrically charged. 
D) They can be generated with electricity. 
E) none of the above 
A) They can be focused using smaller lenses. 
B) They have shorter wavelengths than visible light. 
C) They are electrically charged. 
D) They can be generated with electricity. 
E) none of the above

Question 4

Does it make sense to say that a textbook is about 99.9 percent empty space?

Accepted Answer

A) No.A textbook is a solid and thus is quite dense.Therefore it is not 99.9 percent empty space. 
B) No.Only gases are considered to be 99.9 percent empty space.Liquids and solids are not. 
C) Yes.A textbook like all material things is made up of atoms,which are considered to be 99.9 percent empty space. 
D) No.A textbook could only be considered to be 99.9 percent empty space if it were combusted. 
A) No.A textbook is a solid and thus is quite dense.Therefore it is not 99.9 percent empty space. 
B) No.Only gases are considered to be 99.9 percent empty space.Liquids and solids are not. 
C) Yes.A textbook like all material things is made up of atoms,which are considered to be 99.9 percent empty space. 
D) No.A textbook could only be considered to be 99.9 percent empty space if it were combusted.

Question 5

Which element has the atomic number 9?

Accepted Answer

A) F 
B) Ne 
C) B 
D) Na 
E) Be 
A) F 
B) Ne 
C) B 
D) Na 
E) Be

Question 6

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 7

If you remove two protons and two electrons from a sulfur atom (S),what new element is formed?

Accepted Answer

A) Si 
B) Si+2 
C) Al+2 
D) Al 
E) Ar-2 
A) Si 
B) Si+2 
C) Al+2 
D) Al 
E) Ar-2

Question 8

How is the term photon related to the term quantum?

Accepted Answer

A) A quantum of light is actually one photon. 
B) A quantum of photons is equal to the wavelength. 
C) A quantum is a particle of light while a photon is a wave of light. 
D) A quantum is a particle of light exactly one photon long. 
E) A quantum is a wave of light while a packet of quanta equals one photon. 
A) A quantum of light is actually one photon. 
B) A quantum of photons is equal to the wavelength. 
C) A quantum is a particle of light while a photon is a wave of light. 
D) A quantum is a particle of light exactly one photon long. 
E) A quantum is a wave of light while a packet of quanta equals one photon.

Question 9

Which of the following could be represented by a physical model?

Accepted Answer

A) a cell 
B) an atom 
C) rationality 
D) ecosystem 
E) both A and B 
A) a cell 
B) an atom 
C) rationality 
D) ecosystem 
E) both A and B

Question 10

Which of the following elements are in the same period as magnesium (Mg)?

Accepted Answer

A) Cl 
B) Ca 
C) Mn 
D) Sr 
E) none of the above 
A) Cl 
B) Ca 
C) Mn 
D) Sr 
E) none of the above

Question 11

Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom?

Accepted Answer

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

Question 12

Which has more atoms: a 1-gram sample of carbon-12 or a 1-gram sample of carbon-13?

Accepted Answer

A) More information is needed. 
B) a 1-gram sample of carbon-12 
C) a 1-gram sample of carbon-13 
D) They have the same number of atoms. 
A) More information is needed. 
B) a 1-gram sample of carbon-12 
C) a 1-gram sample of carbon-13 
D) They have the same number of atoms.

Question 13

If a neutral element has the following chemical symbol,how many electrons does it have? 18
6 O

Accepted Answer

A) 6 
B) 18 
C) 12 
D) 24 
E) none of the above 
A) 6 
B) 18 
C) 12 
D) 24 
E) none of the above

Question 14

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu.If the average atomic mass of all the isotopes is 66.5 amu,what can be said about the relative abundance of the isotopes?

Accepted Answer

A) The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. 
B) The isotope with the mass of 65 is more abundant than the isotope with the mass of 67. 
C) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. 
D) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. 
E) All the isotopes have the same relative abundance. 
A) The isotope with the mass of 67 is more abundant than the isotope with the mass of 65. 
B) The isotope with the mass of 65 is more abundant than the isotope with the mass of 67. 
C) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 67. 
D) The isotope with the mass of 66.5 is more abundant than the isotope with the mass of 65. 
E) All the isotopes have the same relative abundance.

Question 15

Boron has primarily two isotopes,one with an atomic mass of 11 amu and another with an atomic mass of 10 amu.If the abundance of the boron atom with a mass of 11 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent,what would be the average mass of the boron atom?

Accepted Answer

A) 10.19 amu 
B) 11 amu 
C) 10 amu 
D) 10.81 amu 
E) not enough information given 
A) 10.19 amu 
B) 11 amu 
C) 10 amu 
D) 10.81 amu 
E) not enough information given

Question 16

How might the spectrum of an atom appear if its electrons were not restricted to particular energy levels?

Accepted Answer

A) It would appear nearly the same as it does with the energy level restrictions. 
B) There would be no frequencies within the visible portion of the electromagnetic spectrum. 
C) A broad spectrum of all colors would be observed. 
D) The frequency of the spectral lines would change with temperature. 
A) It would appear nearly the same as it does with the energy level restrictions. 
B) There would be no frequencies within the visible portion of the electromagnetic spectrum. 
C) A broad spectrum of all colors would be observed. 
D) The frequency of the spectral lines would change with temperature.

Question 17

What is the valence shell?

Accepted Answer

A) It is the outermost shell of electrons in an atom. 
B) It is the shell of electrons in an atom that is the least reactive. 
C) It is the last partially filled orbital in an atom. 
D) It is the shell of electrons in element V (atomic no.= 23). 
E) It is the same as the orbital configuration. 
A) It is the outermost shell of electrons in an atom. 
B) It is the shell of electrons in an atom that is the least reactive. 
C) It is the last partially filled orbital in an atom. 
D) It is the shell of electrons in element V (atomic no.= 23). 
E) It is the same as the orbital configuration.

Question 18

The following statement describes which subatomic particle best? It does not have an electrical charge.

Accepted Answer

A) an electron 
B) a proton 
C) a neutron 
D) A and B 
E) B and C 
A) an electron 
B) a proton 
C) a neutron 
D) A and B 
E) B and C

Question 19

What subatomic particle by itself is least affected by electromagnetic radiation?

Accepted Answer

A) the electron 
B) the proton 
C) the neutron 
D) the nucleus 
A) the electron 
B) the proton 
C) the neutron 
D) the nucleus

Question 20

The mass number of an element is

Accepted Answer

A) the sum of the protons and the neutrons. 
B) the sum of the electrons and the protons. 
C) the sum of the electrons and the neutrons. 
D) the sum of the isotopes. 
E) the number of protons. 
A) the sum of the protons and the neutrons. 
B) the sum of the electrons and the protons. 
C) the sum of the electrons and the neutrons. 
D) the sum of the isotopes. 
E) the number of protons.

Exam 12: Atoms and the Periodic Table

Which of the following elements is in the fourth period?

A practical application of the wave nature of electrons is the

What property of an electron makes it possible to use electron microscopes?

Does it make sense to say that a textbook is about 99.9 percent empty space?

Which element has the atomic number 9?

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

If you remove two protons and two electrons from a sulfur atom (S),what new element is formed?

How is the term photon related to the term quantum?

Which of the following could be represented by a physical model?

Which of the following elements are in the same period as magnesium (Mg)?

Which of the following diagrams best represents the size of the atomic nucleus relative to the size of the atom?

Which has more atoms: a 1-gram sample of carbon-12 or a 1-gram sample of carbon-13?

If a neutral element has the following chemical symbol,how many electrons does it have? 18 6 O

An element has two different isotopes: one that weighs 65 amu and another that weighs 67 amu.If the average atomic mass of all the isotopes is 66.5 amu,what can be said about the relative abundance of the isotopes?

Boron has primarily two isotopes,one with an atomic mass of 11 amu and another with an atomic mass of 10 amu.If the abundance of the boron atom with a mass of 11 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent,what would be the average mass of the boron atom?

How might the spectrum of an atom appear if its electrons were not restricted to particular energy levels?

What is the valence shell?

The following statement describes which subatomic particle best? It does not have an electrical charge.

What subatomic particle by itself is least affected by electromagnetic radiation?

The mass number of an element is

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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