Question 1

What type of bond is easily disrupted in aqueous solutions (one in which the solvent is water)?

Accepted Answer

A)  Polar covalent 
B)  Ionic 
C)  Covalent 
A)  Polar covalent 
B)  Ionic 
C)  Covalent

Question 2

Water surface tension is a result of the cohesive nature of water molecules.

Accepted Answer

A) True 
 B)False

Question 3

A single covalent chemical bond represents the sharing of how many electrons?

Accepted Answer

A)  Two 
B)  Three 
C)  One 
D)  Six 
E)  Four 
A)  Two 
B)  Three 
C)  One 
D)  Six 
E)  Four

Question 4

If you place a feather on the surface of a bowl of water, the feather remains suspended on the surface due to the

Accepted Answer

A)  polarity of the water. 
B)  density of the water. 
C)  fact that water is a good solvent. 
D)  surface tension of the water. 
A)  polarity of the water. 
B)  density of the water. 
C)  fact that water is a good solvent. 
D)  surface tension of the water.

Question 5

The second electron shell is considered to be full when it contains _________electrons.

Accepted Answer

The answer of The second electron shell is considered to...

Question 6

Sodium (Na), atomic number 11, has a tendency to lose an electron in the presence of chlorine. After losing the electron, Na has _________protons in its nucleus.

Accepted Answer

A)  22 
B)  11 
C)  21 
D)  12 
E)  10 
A)  22 
B)  11 
C)  21 
D)  12 
E)  10

Question 7

Which of the following results from an unequal sharing of electrons between atoms?

Accepted Answer

A)  Nonpolar covalent bond 
B)  Polar covalent bond 
C)  Ionic bond 
D)  Hydrogen bond 
E)  Electron-proton interaction 
A)  Nonpolar covalent bond 
B)  Polar covalent bond 
C)  Ionic bond 
D)  Hydrogen bond 
E)  Electron-proton interaction

Question 8

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common?

Accepted Answer

A)  O, C, P, S 
B)  O, C, N, Na 
C)  C, N, Ca, S 
D)  O, C, H, N 
E)  C, H, Ca, Cl 
A)  O, C, P, S 
B)  O, C, N, Na 
C)  C, N, Ca, S 
D)  O, C, H, N 
E)  C, H, Ca, Cl

Question 9

What does H-O-H represent?

Accepted Answer

A)  Atom of water 
B)  Ionic bonding of water 
C)  Mixture including water 
D)  Molecule of water 
A)  Atom of water 
B)  Ionic bonding of water 
C)  Mixture including water 
D)  Molecule of water

Question 10

For ice to melt, it has to

Accepted Answer

A)  increase its heat of vaporization. 
B)  increase its property of cohesion. 
C)  become less dense. 
D)  absorb heat from its surroundings. 
A)  increase its heat of vaporization. 
B)  increase its property of cohesion. 
C)  become less dense. 
D)  absorb heat from its surroundings.

Question 11

Isotopes are atoms of the same element that have different numbers of_________ .

Accepted Answer

The answer of Isotopes are atoms of the same element...

Question 12

Different types of living matter often have different forms of the same elements in their bodies. For example, the nitrogen in an animal often has a slightly different atomic structure than the nitrogen in a plant. Recently, nutritionists have discovered how to deduce the diets of various animal species by examining the type of nitrogen (and other elements) inside their bodies. What is the chemical basis behind this scenario?

Accepted Answer

A)  Covalent bonds result when two atoms share electrons. 
B)  Radioactive elements can be used to trace the paths of molecules through the body. 
C)  Isotopes of the same element have the same atomic number but different atomic masses. 
D)  Hydrophobic interactions keep water molecules from forming bonds with fats and oils. 
E)  Antioxidants buffer the potential damage that free radicals do to cells. 
A)  Covalent bonds result when two atoms share electrons. 
B)  Radioactive elements can be used to trace the paths of molecules through the body. 
C)  Isotopes of the same element have the same atomic number but different atomic masses. 
D)  Hydrophobic interactions keep water molecules from forming bonds with fats and oils. 
E)  Antioxidants buffer the potential damage that free radicals do to cells.

Question 13

Which of the following represents a molecule characterized by polar covalent bonding?

Accepted Answer

A)  NaCl 
B)  H2O 
C)  O2 
D)  H2 
E)  CH4 
A)  NaCl 
B)  H2O 
C)  O2 
D)  H2 
E)  CH4

Question 14

The part of the atom that has the greatest biological interest and interactions with other atoms is the

Accepted Answer

A)  neutron. 
B)  proton. 
C)  electron. 
D)  innermost electron shell. 
A)  neutron. 
B)  proton. 
C)  electron. 
D)  innermost electron shell.

Question 15

Which of the following is an example of hydrogen bonding?

Accepted Answer

A)  The bond between O and H in a single molecule of water 
B)  The bond between O of one water molecule and O of a separate water molecule 
C)  The bond between the H of a water molecule and H of a hydrogen molecule 
D)  The bond between O of one water molecule and H of a separate water molecule 
E)  The bond between H of one water molecule and H of a separate water molecule 
A)  The bond between O and H in a single molecule of water 
B)  The bond between O of one water molecule and O of a separate water molecule 
C)  The bond between the H of a water molecule and H of a hydrogen molecule 
D)  The bond between O of one water molecule and H of a separate water molecule 
E)  The bond between H of one water molecule and H of a separate water molecule

Question 16

Milk of magnesia is often used to treat stomach upset. It has a pH of 10. Based on this information, milk of magnesia

Accepted Answer

A)  has the same pH as stomach acid. 
B)  is a base. 
C)  is an acid. 
D)  is hydrophobic. 
A)  has the same pH as stomach acid. 
B)  is a base. 
C)  is an acid. 
D)  is hydrophobic.

Question 17

You drop a handful of common table salt into a glass of water. Which of the following best describes what is happening inside the glass at the molecular level?

Accepted Answer

A)  Sodium and chloride ions form a covalent bond. 
B)  The positively charged hydrogen ends of the water molecules are attracted to sodium ions. 
C)  The positively charged hydrogen ends of the water molecules are attracted to chloride ions. 
D)  Water and sodium form a covalent bond. 
A)  Sodium and chloride ions form a covalent bond. 
B)  The positively charged hydrogen ends of the water molecules are attracted to sodium ions. 
C)  The positively charged hydrogen ends of the water molecules are attracted to chloride ions. 
D)  Water and sodium form a covalent bond.

Question 18

Every atom of the same element has an equal number of electrons and protons.

Accepted Answer

A) True 
 B)False

Question 19

The atomic number of an atom is defined as the

Accepted Answer

A)  number of neutrons in the atomic nucleus. 
B)  total number of electrons and neutrons. 
C)  number of electrons in the outermost energy level. 
D)  total number of energy shells. 
E)  number of protons in the atomic nucleus. 
A)  number of neutrons in the atomic nucleus. 
B)  total number of electrons and neutrons. 
C)  number of electrons in the outermost energy level. 
D)  total number of energy shells. 
E)  number of protons in the atomic nucleus.

Question 20

Water moves through a plant because of the property of

Accepted Answer

A)  high heat of fusion. 
B)  high specific heat. 
C)  high heat of vaporization. 
D)  cohesion. 
A)  high heat of fusion. 
B)  high specific heat. 
C)  high heat of vaporization. 
D)  cohesion.

Exam 2: Atoms, Molecules, and Life

What type of bond is easily disrupted in aqueous solutions (one in which the solvent is water)?

Water surface tension is a result of the cohesive nature of water molecules.

A single covalent chemical bond represents the sharing of how many electrons?

If you place a feather on the surface of a bowl of water, the feather remains suspended on the surface due to the

The second electron shell is considered to be full when it contains _________electrons.

Sodium (Na), atomic number 11, has a tendency to lose an electron in the presence of chlorine. After losing the electron, Na has _________protons in its nucleus.

Which of the following results from an unequal sharing of electrons between atoms?

If you examined the human body on a chemical composition basis, which of the following combinations of elements would be most common?

What does H-O-H represent?

For ice to melt, it has to

Isotopes are atoms of the same element that have different numbers of_________ .

Which of the following represents a molecule characterized by polar covalent bonding?

The part of the atom that has the greatest biological interest and interactions with other atoms is the

Which of the following is an example of hydrogen bonding?

Milk of magnesia is often used to treat stomach upset. It has a pH of 10. Based on this information, milk of magnesia

You drop a handful of common table salt into a glass of water. Which of the following best describes what is happening inside the glass at the molecular level?

Every atom of the same element has an equal number of electrons and protons.

The atomic number of an atom is defined as the

Water moves through a plant because of the property of

An Introduction to Life on Earth

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

DNA: The Molecule of Heredity

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity Ii: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

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