Question 1

Radioactive ____ is commonly used to treat patients with dangerously overactive thyroid glands. ​

Accepted Answer

A) carbon 
B) radium 
C) iodine 
D) thallium 
E) cobalt 
A) carbon 
B) radium 
C) iodine 
D) thallium 
E) cobalt C

Question 2

Which element is likely to be chemically unreactive? ​

Accepted Answer

A) chlorine (7 valence electrons) 
B) calcium (2 valence electrons) 
C) argon (8 valence electrons) 
D) carbon (4 valence electrons) 
E) potassium (1 valence electron) 
A) chlorine (7 valence electrons) 
B) calcium (2 valence electrons) 
C) argon (8 valence electrons) 
D) carbon (4 valence electrons) 
E) potassium (1 valence electron) C

Question 3

Electronegativity is the tendency of an atom to attract ____ to itself in a chemical bond. ​

Accepted Answer

A) neutrons 
B) protons 
C) electrons 
D) delta forces 
E) polar associations 
A) neutrons 
B) protons 
C) electrons 
D) delta forces 
E) polar associations C

Question 4

Match between columns
                        Premises: Occurs in sodium chloride (NaCl)

Accepted Answer

The Answer of nonpolar covalent bonds and ionic bonds and is...

Question 5

Explain how radiometric dating allows scientists to determine the age of a particular fossil.

Accepted Answer

Radioactive isotopes decay in a very pre

Question 6

Match between columns
                        Premises: Occurs when electrons are shared unequally between two atoms

Accepted Answer

The Answer of van der Waals forces and hydrogen bonds is...

Question 7

Match between columns
                        Premises: Generates regions of partial positivity and partial negativity within a molecule

Accepted Answer

The Answer of polar covalent bonds and hydrogen bonds and is...

Question 8

Figure 2.4
The water strider shown in the figure above is able to stand on water because of the ____ of water.

Accepted Answer

A) covalent bonds 
B) surface tension 
C) van der Waals forces 
D) density 
E) hydration layer 
A) covalent bonds 
B) surface tension 
C) van der Waals forces 
D) density 
E) hydration layer

Question 9

In the representation of hydrogen gas, H-H, the dash represents two electrons being shared equally.

Accepted Answer

A) True 
 B)False

Question 10

The four elements that make up more than 96% of the weight of living organisms are oxygen, carbon, hydrogen and calcium.

Accepted Answer

A) True 
 B)False

Question 11

Geckos are able to cling to vertical walls due to ____. ​

Accepted Answer

A) polar covalent bonds 
B) van der Waals forces 
C) ionic bonds 
D) hydrogen bonds 
E) nonpolar covalent bonds 
A) polar covalent bonds 
B) van der Waals forces 
C) ionic bonds 
D) hydrogen bonds 
E) nonpolar covalent bonds

Question 12

Buffers can increase the pH of a solution when acids are added.

Accepted Answer

A) True 
 B)False

Question 13

An oxygen atom has ____ surrounding a nucleus composed of ____. ​

Accepted Answer

A) neutrons; electrons and protons 
B) electrons; protons and neutrons 
C) protons and electrons; neutrons 
D) protons; neutrons and electrons 
E) electrons and neutrons; protons 
A) neutrons; electrons and protons 
B) electrons; protons and neutrons 
C) protons and electrons; neutrons 
D) protons; neutrons and electrons 
E) electrons and neutrons; protons

Question 14

Describe the difference between cohesion and adhesion, and how they, together, allow water to move upward in plants.

Accepted Answer

Cohesion is the resistance of a molecule

Question 15

In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH4 is ____. ​

Accepted Answer

A) ​1 
B) ​2 
C) ​4 
D) ​5 
E) ​8 
A) ​1 
B) ​2 
C) ​4 
D) ​5 
E) ​8

Question 16

The substance H2O is considered to be ____. ​

Accepted Answer

A) both a molecule and a compound 
B) a compound but not a molecule 
C) neither a molecule nor a compound 
D) a molecule but not a compound 
E) both a molecule and an ion 
A) both a molecule and a compound 
B) a compound but not a molecule 
C) neither a molecule nor a compound 
D) a molecule but not a compound 
E) both a molecule and an ion

Question 17

Match between columns
                        Premises: Occurs between water molecules

Accepted Answer

The Answer of ionic bonds and van der Waals forces is...

Question 18

In contrast to ionic bonds, covalent bonds ____. ​

Accepted Answer

A) hold atoms together 
B) have distinct, three-dimensional forms 
C) transfer electrons from one atom to another 
D) are rarely broken 
E) are transient 
A) hold atoms together 
B) have distinct, three-dimensional forms 
C) transfer electrons from one atom to another 
D) are rarely broken 
E) are transient

Question 19

Figure 2.3
Answer the question using the accompanying figure. The molecule shown is held together by ____. ​

Accepted Answer

A) polar covalent bonds 
B) van der Waals forces 
C) ionic bonds 
D) hydrogen bonds 
E) nonpolar covalent bonds 
A) polar covalent bonds 
B) van der Waals forces 
C) ionic bonds 
D) hydrogen bonds 
E) nonpolar covalent bonds

Question 20

In the presence of water, nonpolar associations form between molecules or regions of molecules that are ____. ​

Accepted Answer

A) partially charged 
B) hydrophobic and hydrophilic 
C) hydrophobic 
D) fully charged 
E) hydrophilic 
A) partially charged 
B) hydrophobic and hydrophilic 
C) hydrophobic 
D) fully charged 
E) hydrophilic

Exam 2: Life, Chemistry, and Water

Radioactive ____ is commonly used to treat patients with dangerously overactive thyroid glands. ​

Which element is likely to be chemically unreactive? ​

Electronegativity is the tendency of an atom to attract ____ to itself in a chemical bond. ​

Explain how radiometric dating allows scientists to determine the age of a particular fossil.

Figure 2.4 The water strider shown in the figure above is able to stand on water because of the ____ of water.

In the representation of hydrogen gas, H-H, the dash represents two electrons being shared equally.

The four elements that make up more than 96% of the weight of living organisms are oxygen, carbon, hydrogen and calcium.

Geckos are able to cling to vertical walls due to ____. ​

Buffers can increase the pH of a solution when acids are added.

An oxygen atom has ____ surrounding a nucleus composed of ____. ​

Describe the difference between cohesion and adhesion, and how they, together, allow water to move upward in plants.

In a molecule of methane, CH4, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH4 is ____. ​

The substance H2O is considered to be ____. ​

In contrast to ionic bonds, covalent bonds ____. ​

Figure 2.3 Answer the question using the accompanying figure. The molecule shown is held together by ____. ​

In the presence of water, nonpolar associations form between molecules or regions of molecules that are ____. ​

Introduction to Biological Concepts and Research

Biological Molecules: the Carbon Compounds of Life

Cells

Membranes and Transport

Energy, Enzymes, and Biological Reactions

Cellular Respiration: Harvesting Chemical Energy

Photosynthesis

Cell Communication

Cell Division and Mitosis

Meiosis: the Cellular Basis of Sexual Reproduction

Mendel, Genes, and Inheritance

Genes, Chromosomes, and Human Genetics

DNA Structure, Replication, and Organization

From DNA to Protein

Regulation of Gene Expression

Bacterial and Viral Genetics

Dna Technologies: Making and Using Genetically Altered Organisms, and Other Applications

Genomes and Proteomes

The Development of Evolutionary Thought

Microevolution: Genetic Changes Within Populations

Speciation

Paleobiology and Macroevolution

Systematic Biology: Phylogeny and Classification

The Origin of Life

Prokaryotes and Viruses

Protists

Seedless Plants

Seed Plants

Fungi

Animal Phylogeny, Acoelomates, and Protostomes

Deuterostomes: Vertebrates and Their Closest Relatives

The Plant Body

Transport in Plants

Plant Nutrition

Reproduction and Development in Flowering Plants

Plant Signals and Responses to the Environment

Introduction to Animal Organization and Physiology

Information Flow and the Neuron

Nervous Systems

Sensory Systems

The Endocrine System

Muscles, Bones, and Body Movements

The Circulatory System

Defenses Against Disease

Gas Exchange: the Respiratory System

Animal Nutrition

Regulating the Internal Environment

Animal Reproduction

Animal Development

Ecology and the Biosphere

Population Ecology

Population Interactions and Community Ecology

Ecosystems

Biodiversity and Conservation Biology

Animal Behavior

Filters

Radioactive ____ is commonly used to treat patients with dangerously overactive thyroid glands.

Which element is likely to be chemically unreactive?

Electronegativity is the tendency of an atom to attract ____ to itself in a chemical bond.

Geckos are able to cling to vertical walls due to ____.

An oxygen atom has surrounding a nucleus composed of .

In a molecule of methane, CH₄, each hydrogen atom shares an orbital with the carbon atom. The total number of shared electrons in CH₄ is ____.

The substance H₂O is considered to be ____.

In contrast to ionic bonds, covalent bonds ____.

Figure 2.3 Answer the question using the accompanying figure. The molecule shown is held together by ____.

In the presence of water, nonpolar associations form between molecules or regions of molecules that are ____.