Question 1

Isotopes of an element differ in their

Accepted Answer

A)   proton number.
B)   electron number.
C)   neutron number.
D)   type of bonds.
E)   atomic number.F) All of the above
G) B) and C)

Question 2

Of the following examples, which best demonstrates the property of water cohesion?

Accepted Answer

A)   Water can move up a 100-foot pine tree, from the roots to the leaves.
B)   A rock skipping across the surface of a lake.
C)   Water requires a great deal of heat to reach the point of vaporizing.
D)   A can of soda bursts when it is placed in the freezer.
E)   A large body of fresh water takes a long time to warm up after the winter season.F) B) and E)
G) B) and D)

Question 3

Which of the following would be an example of the value of water's heat capacity?

Accepted Answer

A)   Water is able to travel up a 100-foot tree.
B)   Water expands as it freezes causing ice to float on the surface of a lake.
C)   Living organisms are able to maintain their internal body temperatures because the water in their cells resists changes in temperature.
D)   Small insects can walk on water.
E)   Ice cubes float.F) C) and D)
G) A) and B)

Question 4

Isotopes of an atom differ in their

Accepted Answer

A)   atomic number.
B)   atomic mass.
C)   number of electrons.
D)   atomic radius.
E)   number of protons.F) A) and E)
G) C) and D)

Question 5

Which of these does not occur when a sodium atom transfers an electron to a chlorine atom?

Accepted Answer

A)   The sodium atom becomes a positively charged ion.
B)   The positive and negative ions will attract each other, forming a crystal if no water is present.
C)   The ions will separate in the presence of water.
D)   There is a mutual sharing of the electrons between the sodium and chlorine atoms.
E)   The chlorine atom becomes a negatively charged ion.F) A) and B)
G) C) and D)

Question 6

The type of bond that would form from the transfer of an electron from one atom to another, shown below, is an)  ________ bond.

Accepted Answer

A)   covalent
B)   ionic
C)   hydrogen
D)   atomic
E)   isotopicF) A) and B)
G) A) and C)

Question 7

Which of the following would not be a valuable use for radioactive isotopes?

Accepted Answer

A)   carbon-14 dating
B)   destroying abnormal cells as a type of cancer treatment
C)   tracing the path of various chemicals in the body for imaging
D)   determining the age of biological specimens
E)   damaging DNA of healthy cellsF) A) and D)
G) A) and C)

Question 8

A covalent bond involves the sharing of

Accepted Answer

A)   electrons.
B)   protons.
C)   pairs of protons.
D)   at least three electrons.
E)   pairs of electrons.F) All of the above
G) C) and E)

Question 9

The figure below is depicting the interaction of water molecules with one another, which involves the use of

Accepted Answer

A)   covalent bonds.
B)   hydrogen bonds.
C)   ionic bonds.
D)   postive and negative ions.
E)   no chemical bonding.F) B) and D)
G) B) and E)

Question 10

How does a strong acid differ from a weak acid?

Accepted Answer

A)   A strong acid contains fewer H+ in solution.
B)   A weak acid dissociates only partially in water.
C)   A strong acid is less likely to remain dissociated.
D)   A weak acid dissociates nearly completely in water.
E)   A strong acid dissociates only partly in water.F) A) and B)
G) A) and C)

Question 11

Which of the following explains the events occurring when water boils?

Accepted Answer

A)   Hydrogen bonds are broken between neighboring water molecules.
B)   Covalent bonds are broken between oxygen and hydrogen atoms.
C)   Ionic bonds are broken when the minerals in water are heated.
D)   The bond between one water molecule and another is strengthened.
E)   The hydrogen atoms break away from the oxygen and escape as vapor.F) A) and D)
G) A) and B)

Question 12

The electron arrangement for argon, which has 18 electrons, is

Accepted Answer

A)   2 in the inner energy shell, 8 in the second energy shell, and 8 in the outer energy shell.
B)   8 in the inner energy shell, 8 in the second energy shell, and 2 in the outer energy shell.
C)   6 in the inner energy shell, 6 in the second energy shell, and 6 in the outer energy shell.
D)   5 in the inner energy shell, 6 in the second energy shell, and 7 in the outer energy shell.
E)   7 in the inner energy shell, 6 in the second energy shell, and 5 in the outer energy shell.F) A) and B)
G) A) and E)

Question 13

What is the steam being given off when water boils?

Accepted Answer

A)   oxygen molecules
B)   hydrogen molecules
C)   water molecules
D)   hydroxide OH-)  ions
E)   hydrogen H+)  ionsF) All of the above
G) A) and C)

Question 14

In the reaction 6CO2 + 6H2OC6H12O6 + 6O2 carbon dioxide is one of the

Accepted Answer

A)   reactants.
B)   products.
C)   enzymes.
D)   elements.
E)   catalysts.F) A) and B)
G) A) and E)

Question 15

The atomic structure of water satisfies the octet rule by having

Accepted Answer

A)   electrons shared between the two oxygen atoms.
B)   electrons from hydrogen transferred to the oxygen atom.
C)   electrons from oxygen transferred to the hydrogen atoms.
D)   oxygen share electrons with two hydrogen atoms.
E)   electrons shared between the two hydrogen atoms.F) A) and B)
G) C) and E)

Question 16

Baking soda is sometimes used as an antacid. The chemical name for baking soda is sodium bicarbonate. What is the bicarbonate doing to help with stomach upset?

Accepted Answer

A)   It is serving as a buffer to take up excess H+ ions from stomach acid.
B)   It is able to coat the stomach lining.
C)   The bicarbonate helps to create more acid in the stomach.
D)   The bicarbonate acts as a strong acid quickly dissociating into H+ ions.
E)   It relaxes the stomach muscles.F) A) and C)
G) B) and E)

Question 17

An)  ________ can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H+ in a solution.

Accepted Answer

A)   equalizer
B)   solute
C)   buffer
D)   acid
E)   baseF) All of the above
G) A) and E)

Question 18

Although Oregon and South Dakota are at similar latitudes, winters in Oregon are warmer and summers in Oregon are cooler. Which of the following might explain these differences between the climate of Oregon and the climate of South Dakota?

Accepted Answer

A)   South Dakota has fewer trees.
B)   The Pacific Ocean makes Oregon temperatures more moderate.
C)   Oregon receives more rainfall.
D)   South Dakota has fewer lakes and rivers.
E)   South Dakota has more prevailing winds from the west.F) A) and B)
G) B) and C)

Question 19

Which of the following best describes the structure of how water molecules form and interact?

Accepted Answer

A)   Hydrogen atoms bond with each other to create a stable outer shell of electrons. Then they form a hydrogen bond to an oxygen atom to create the water molecule.
B)   Oxygen atoms transfer one electron to each of the hydrogen atoms, forming an ionic bond that attracts other water molecules to it.
C)  Oxygen atoms transfer one electron to each of the hydrogen atoms, forming an ionic bond that attracts other water molecules to it
D)   Hydrogen bonds are formed between the two hydrogen atoms and the oxygen atom. This water molecule then forms a covalent bond with adjacent water molecules.
E)   The oxygen atom is more electronegative than the two hydrogen atoms. Due to this, it removes the electron from each hydrogen atom. This satisfies the outer shell of oxygen. Then hydrogen bonds form between the two remaining hydrogen atoms to hold them near to the oxygen atom.F) B) and C)
G) A) and D)

Question 20

An ionic bond forms when

Accepted Answer

A)   an atom gives away or takes in an electron.
B)   an atom gives away or takes in a proton.
C)   a negatively charged ion is attracted to one with a positive charge.
D)   two atoms come close enough to share one or more electrons.
E)   two atoms come close enough to share one or more protons.F) None of the above
G) B) and D)

Exam 2: The Chemical Basis of Life

The figure below is depicting the interaction of water molecules with one another, which involves the use of

Correct AnswerverifiedShow Answer

Which of the following would not be a valuable use for radioactive isotopes?

Correct AnswerverifiedShow Answer

The atomic structure of water satisfies the octet rule by having

Correct AnswerverifiedShow Answer

Although Oregon and South Dakota are at similar latitudes, winters in Oregon are warmer and summers in Oregon are cooler. Which of the following might explain these differences between the climate of Oregon and the climate of South Dakota?

Correct AnswerverifiedShow Answer

The type of bond that would form from the transfer of an electron from one atom to another, shown below, is an) ________ bond.

Correct AnswerverifiedShow Answer

A covalent bond involves the sharing of

Correct AnswerverifiedShow Answer

Which of the following explains the events occurring when water boils?

Correct AnswerverifiedShow Answer

An ionic bond forms when

Correct AnswerverifiedShow Answer

Which of the following best describes the structure of how water molecules form and interact?

Correct AnswerverifiedShow Answer

Baking soda is sometimes used as an antacid. The chemical name for baking soda is sodium bicarbonate. What is the bicarbonate doing to help with stomach upset?

Correct AnswerverifiedShow Answer

Of the following examples, which best demonstrates the property of water cohesion?

Correct AnswerverifiedShow Answer

Isotopes of an element differ in their

Correct AnswerverifiedShow Answer

What is the steam being given off when water boils?

Correct AnswerverifiedShow Answer

In the reaction 6CO2 + 6H2OC6H12O6 + 6O2 carbon dioxide is one of the

Correct AnswerverifiedShow Answer

Which of these does not occur when a sodium atom transfers an electron to a chlorine atom?

Correct AnswerverifiedShow Answer

An) ________ can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H+ in a solution.

Correct AnswerverifiedShow Answer

Isotopes of an atom differ in their

Correct AnswerverifiedShow Answer

The electron arrangement for argon, which has 18 electrons, is

Correct AnswerverifiedShow Answer

How does a strong acid differ from a weak acid?

Correct AnswerverifiedShow Answer

Which of the following would be an example of the value of water's heat capacity?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

In the reaction 6CO₂ + 6H₂OC₆H₁₂O₆ + 6O₂ carbon dioxide is one of the

Correct Answer
verified

Correct Answer
verified

An) ________ can be defined as a substance that prevents the pH of a solution from changing by either releasing or absorbing H⁺ in a solution.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified