Question 1

Consider the following electronegativity values: Boron (B)  = 1.8
Carbon (C)  = 2.5
Chlorine (Cl)  = 3.2
Selenium (Se)  = 2.6
Which of the following bonds is the most polar?

Accepted Answer

A)  Se-Cl
B)  C-Cl
C)  B-Cl
D)  cannot determine from the information providedE) All of the above
F) B) and C)

Question 2

Atoms of a single element that possess different numbers of neutrons are called:

Accepted Answer

A)  isomers.
B)  polymers.
C)  ions.
D)  isotopes.E) C) and D)
F) B) and D)

Question 3

An atom that is negatively charged because it has accepted an electron is a(n) :

Accepted Answer

A)  isotope.
B)  isomer.
C)  ion.
D)  monomer.E) A) and B)
F) B) and C)

Question 4

An atom has 20 electrons and 20 neutrons.What is the mass of this atom?

Accepted Answer

A)  10
B)  20
C)  40
D)  80E) B) and D)
F) All of the above

Question 5

Atoms containing a specific number of protons are called:

Accepted Answer

A)  molecules
B)  minerals
C)  metals
D)  elementsE) A) and B)
F) A) and D)

Question 6

Which atomic particle has no charge and is located in the nucleus?

Accepted Answer

A)  proton
B)  electron
C)  neutron
D)  ionE) B) and C)
F) A) and B)

Question 7

The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6.What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?

Accepted Answer

A)  1s22s22p63s23p6
B)  1s22s62p23s63p2
C)  1s22s83p8
D)  1s22s23p64s25p6E) A) and B)
F) C) and D)

Question 8

Water molecules are polar with ends that exhibit partial positive and negative charges.These opposite charges allow water molecules to attract each other through:

Accepted Answer

A)  ionic bonds.
B)  covalent bonds.
C)  hydrogen bonds.
D)  peptide bonds.E) A) and D)
F) All of the above

Question 9

Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced.Bicarbonate is acting as a ____ in blood.

Accepted Answer

A)  acid
B)  alkaline
C)  buffer
D)  baseE) A) and D)
F) A) and B)

Question 10

You identify an enzyme involved in a cellular reaction.How does the enzyme affect the reaction equilibrium between reactants and products and the time needed to reach equilibrium?

Accepted Answer

A)  It alters the reaction equilibrium and shortens the time needed to reach equilibrium.
B)  The reaction equilibrium is unaffected, but it shortens the time needed to reach equilibrium.
C)  It alters the reaction equilibrium and lengthens the time needed to reach equilibrium.
D)  The reaction equilibrium is unaffected, but it lengthens the time needed to reach equilibrium.E) B) and D)
F) A) and C)

Question 11

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ______ of energy to break hydrogen bonds.The energy is _____ from heat produced by your body, thus helping to lower the surface temperature of your body.

Accepted Answer

A)  release; released
B)  release; obtained
C)  input; obtained
D)  input; releasedE) A) and B)
F) All of the above

Question 12

Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions.Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell.How are the electrons transferred between these atoms?

Accepted Answer

A)  Chlorine is oxidized and magnesium is reduced.
B)  Both magnesium and chlorine are oxidized.
C)  Both magnesium and chlorine are reduced.
D)  Magnesium is oxidized and chlorine is reduced.E) A) and B)
F) None of the above

Exam 2: The Nature of Molecules and the Properties of Water

Water molecules are polar with ends that exhibit partial positive and negative charges.These opposite charges allow water molecules to attract each other through:

Correct Answer
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Atoms containing a specific number of protons are called:

Correct Answer
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The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s²2s²2p⁶.What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?

Correct Answer
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The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a __ of energy to break hydrogen bonds.The energy is _ from heat produced by your body, thus helping to lower the surface temperature of your body.

Correct Answer
verified

An atom has 20 electrons and 20 neutrons.What is the mass of this atom?

Correct Answer
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Atoms of a single element that possess different numbers of neutrons are called:

Correct Answer
verified

Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced.Bicarbonate is acting as a ____ in blood.

Correct Answer
verified

You identify an enzyme involved in a cellular reaction.How does the enzyme affect the reaction equilibrium between reactants and products and the time needed to reach equilibrium?

Correct Answer
verified

An atom that is negatively charged because it has accepted an electron is a(n) :

Correct Answer
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Which atomic particle has no charge and is located in the nucleus?

Correct Answer
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Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions.Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell.How are the electrons transferred between these atoms?

Correct Answer
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Consider the following electronegativity values: Boron (B) = 1.8 Carbon (C) = 2.5 Chlorine (Cl) = 3.2 Selenium (Se) = 2.6 Which of the following bonds is the most polar?

Correct Answer
verified

Exam 2: The Nature of Molecules and the Properties of Water

Water molecules are polar with ends that exhibit partial positive and negative charges.These opposite charges allow water molecules to attract each other through:

Correct AnswerverifiedShow Answer

Atoms containing a specific number of protons are called:

Correct AnswerverifiedShow Answer

The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s22s22p6.What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?

Correct AnswerverifiedShow Answer

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a ______ of energy to break hydrogen bonds.The energy is _____ from heat produced by your body, thus helping to lower the surface temperature of your body.

Correct AnswerverifiedShow Answer

An atom has 20 electrons and 20 neutrons.What is the mass of this atom?

Correct AnswerverifiedShow Answer

Atoms of a single element that possess different numbers of neutrons are called:

Correct AnswerverifiedShow Answer

Bicarbonate ions in the blood can absorb hydrogen ions, keeping pH balanced.Bicarbonate is acting as a ____ in blood.

Correct AnswerverifiedShow Answer

You identify an enzyme involved in a cellular reaction.How does the enzyme affect the reaction equilibrium between reactants and products and the time needed to reach equilibrium?

Correct AnswerverifiedShow Answer

An atom that is negatively charged because it has accepted an electron is a(n) :

Correct AnswerverifiedShow Answer

Which atomic particle has no charge and is located in the nucleus?

Correct AnswerverifiedShow Answer

Magnesium chloride is a salt formed with ionic bonds between one magnesium ion and two chloride ions.Magnesium has two electrons in its outer shell and chlorine has seven electrons in its outer shell.How are the electrons transferred between these atoms?

Correct AnswerverifiedShow Answer

Consider the following electronegativity values: Boron (B) = 1.8 Carbon (C) = 2.5 Chlorine (Cl) = 3.2 Selenium (Se) = 2.6 Which of the following bonds is the most polar?

Correct AnswerverifiedShow Answer

Correct Answer
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Correct Answer
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The electronic configuration of the noble gas Neon, which has an atomic number of 10, can be written as follows: 1s²2s²2p⁶.What is the electronic configuration of the noble gas Argon, which has an atomic number of 18?

Correct Answer
verified

The high heat of vaporization of water helps you to feel cooler when you sweat because the transition of water from a liquid to a gas requires a __ of energy to break hydrogen bonds.The energy is _ from heat produced by your body, thus helping to lower the surface temperature of your body.

Correct Answer
verified

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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