Question 1

An element is defined as a substance that:

Accepted Answer

A)  is composed of more than one kind of atom. 
B)  is held together by covalent bonds. 
C)  cannot be broken into simpler substances by chemical reactions. 
D)  cannot burn. 
E)  is soluble in both acid and base. 
A)  is composed of more than one kind of atom. 
B)  is held together by covalent bonds. 
C)  cannot be broken into simpler substances by chemical reactions. 
D)  cannot burn. 
E)  is soluble in both acid and base.

Question 2

Which of the following statements concerning van der Waal interactions is FALSE:

Accepted Answer

A)  They are attractive forces. 
B)  They are very strong. 
C)  They involve transient regions of positive and negative charges. 
D)  They form between nonpolar molecules. 
E)  They operate over very short distances. 
A)  They are attractive forces. 
B)  They are very strong. 
C)  They involve transient regions of positive and negative charges. 
D)  They form between nonpolar molecules. 
E)  They operate over very short distances.

Question 3

An atom has six protons and eight neutrons.Its atomic mass is __________ atomic mass units.

Accepted Answer

A)  two 
B)  four 
C)  six 
D)  eight 
E)  fourteen 
A)  two 
B)  four 
C)  six 
D)  eight 
E)  fourteen

Question 4

Diagram and carefully label two water molecules using a ball-and-stick model.Then use this diagram to demonstrate how hydrogen bonds form between them.

Accepted Answer

The diagram should resemble Fig.2-13 exc

Question 5

MATCHING
Match the type of bond or interaction with its description.
a.hydrogen bond
c.ionic bond
b.van de Waals interaction
d.covalent bond
-Weak attractive force joining a hydrogen atom with an electronegative atom such as oxygen

Accepted Answer

The answer of MATCHING
Match the type of bond or interaction...

Question 6

Which of the following statements is FALSE?

Accepted Answer

A)  The 1st principal energy level contains 1 orbital. 
B)  The 2nd principal energy level contains 4 orbitals. 
C)  The 1st principal energy level contains a maximum of 2 electrons. 
D)  The 2nd energy level contains a maximum of 10 electrons. 
E)  The 2nd energy level contains 1 spherical orbital and 3 dumbbell-shaped orbitals.. 
A)  The 1st principal energy level contains 1 orbital. 
B)  The 2nd principal energy level contains 4 orbitals. 
C)  The 1st principal energy level contains a maximum of 2 electrons. 
D)  The 2nd energy level contains a maximum of 10 electrons. 
E)  The 2nd energy level contains 1 spherical orbital and 3 dumbbell-shaped orbitals..

Question 7

Which property of water enables living things to survive in ponds covered with ice?

Accepted Answer

A)  high heat of vaporization 
B)  high specific heat 
C)  degree of surface tension 
D)  cohesion 
E)  greatest density at 4oC 
A)  high heat of vaporization 
B)  high specific heat 
C)  degree of surface tension 
D)  cohesion 
E)  greatest density at 4oC

Question 8

In a water molecule, because oxygen is more electronegative than hydrogen, the shared electrons are more commonly found around the __________ nucleus than the __________ nucleus.

Accepted Answer

A)  oxygen; hydrogen 
B)  hydrogen; oxygen 
C)  hydrogen; other hydrogen 
D)  oxygen; nitrogen 
E)  nitrogen; oxygen 
A)  oxygen; hydrogen 
B)  hydrogen; oxygen 
C)  hydrogen; other hydrogen 
D)  oxygen; nitrogen 
E)  nitrogen; oxygen

Question 9

MATCHING
Match the type of bond or interaction with its description.
a.hydrogen bond
c.ionic bond
b.van de Waals interaction
d.covalent bond
-Strong attractive force resulting from the transfer of electrons between atoms

Accepted Answer

The answer of MATCHING
Match the type of bond or interaction...

Question 10

Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary action
-Tendency of water to move in narrow tubes

Accepted Answer

The answer of Match the term with its description:
a.adhesion
c.surface tension
b.cohesion
d.capillary...

Question 11

When a small amount of hydrochloric acid (HCl) is added to a solution of Na2HPO4, the pH of the solution does not change markedly.The pH also does not change drastically when a small amount of sodium hydroxide (NaOH) is added to this same solution.Based on these observations, the compound Na2HPO4 is:

Accepted Answer

A)  able to donate hydrogen atoms to HCl. 
B)  able to remove hydrogen ions from the OH - of NaOH. 
C)  acting as a buffer. 
D)  an enzyme facilitating the reaction between HCl and NaOH. 
E)  acting as a solvent. 
A)  able to donate hydrogen atoms to HCl. 
B)  able to remove hydrogen ions from the OH - of NaOH. 
C)  acting as a buffer. 
D)  an enzyme facilitating the reaction between HCl and NaOH. 
E)  acting as a solvent.

Question 12

In a chemical reaction, the product is:

Accepted Answer

A)  generally written on the right side of the equation. 
B)  always in equilibrium with the reactants. 
C)  the substance that is generated by the reaction. 
D)  joined by an ionic bond only. 
E)  generally written on the right side and is the substance generated by the reaction. 
A)  generally written on the right side of the equation. 
B)  always in equilibrium with the reactants. 
C)  the substance that is generated by the reaction. 
D)  joined by an ionic bond only. 
E)  generally written on the right side and is the substance generated by the reaction.

Question 13

Which of the following atoms would most likely be involved in an ionic bond?

Accepted Answer

A)  hydrogen 
B)  oxygen 
C)  sodium 
D)  hydrogen and oxygen. 
E)  hydrogen and sodium. 
A)  hydrogen 
B)  oxygen 
C)  sodium 
D)  hydrogen and oxygen. 
E)  hydrogen and sodium.

Question 14

Covalently bonded atoms with similar electronic negativities are:

Accepted Answer

A)  ionic. 
B)  polar. 
C)  nonpolar. 
D)  partially positive. 
E)  partially negative. 
A)  ionic. 
B)  polar. 
C)  nonpolar. 
D)  partially positive. 
E)  partially negative.

Question 15

A stalk of celery is placed in a solution of blue colored dye.After one hour, the leaves have blue fluid in their veins.Which property of water is being demonstrated?

Accepted Answer

A)  adhesion and cohesion 
B)  evaporation and cooling 
C)  lower density as a solid than as a liquid 
D)  high specific heat 
E)  surface tension 
A)  adhesion and cohesion 
B)  evaporation and cooling 
C)  lower density as a solid than as a liquid 
D)  high specific heat 
E)  surface tension

Question 16

Which of the following elements is NOT responsible for a significant portion of the mass of living organisms?

Accepted Answer

A)  O 
B)  S 
C)  N 
D)  H 
E)  C 
A)  O 
B)  S 
C)  N 
D)  H 
E)  C

Question 17

Figure 2-1
Use the figure below to answer the corresponding question(s).  
-The difference between the two atoms in Figure 2-1 is:

Accepted Answer

A)  pH. 
B)  the number of electrons. 
C)  the number of protons. 
D)  the number of neutrons. 
E)  electrical charge. 
A)  pH. 
B)  the number of electrons. 
C)  the number of protons. 
D)  the number of neutrons. 
E)  electrical charge.

Question 18

Which characteristic of water molecules directly contributes to the remarkable "water walking" success of the aquatic insects pictured in the accompanying figure?

Accepted Answer

A)  hydrogen bonds 
B)  capillary action 
C)  nonpolar covalent bonds 
D)  ionic bonds 
E)  adhesive forces 
A)  hydrogen bonds 
B)  capillary action 
C)  nonpolar covalent bonds 
D)  ionic bonds 
E)  adhesive forces

Question 19

MATCHING
Match the type of bond or interaction with its description.
a.hydrogen bond
c.ionic bond
b.van de Waals interaction
d.covalent bond
-In a structural formula this is represented by a straight line

Accepted Answer

The answer of MATCHING
Match the type of bond or interaction...

Question 20

The difference between an electrically neutral atom and an ion is that:

Accepted Answer

A)  an ion has an unequal number of protons and electrons, while an atom has an equal number. 
B)  an ion has an equal number of protons and electrons, while an atom has an unequal number. 
C)  an atom has an unequal number of neutrons and protons, while an ion has an equal number. 
D)  an atom has its electrons in orbitals, while an ion has its electrons in its nucleus. 
E)  an atom must have an equal number of neutrons and electrons, while an ion does not. 
A)  an ion has an unequal number of protons and electrons, while an atom has an equal number. 
B)  an ion has an equal number of protons and electrons, while an atom has an unequal number. 
C)  an atom has an unequal number of neutrons and protons, while an ion has an equal number. 
D)  an atom has its electrons in orbitals, while an ion has its electrons in its nucleus. 
E)  an atom must have an equal number of neutrons and electrons, while an ion does not.

Exam 2: Atoms and Molecules: the Chemical Basis of Life

An element is defined as a substance that:

Which of the following statements concerning van der Waal interactions is FALSE:

An atom has six protons and eight neutrons.Its atomic mass is __________ atomic mass units.

Diagram and carefully label two water molecules using a ball-and-stick model.Then use this diagram to demonstrate how hydrogen bonds form between them.

MATCHING Match the type of bond or interaction with its description. a.hydrogen bond c.ionic bond b.van de Waals interaction d.covalent bond -Weak attractive force joining a hydrogen atom with an electronegative atom such as oxygen

Which of the following statements is FALSE?

Which property of water enables living things to survive in ponds covered with ice?

In a water molecule, because oxygen is more electronegative than hydrogen, the shared electrons are more commonly found around the __________ nucleus than the __________ nucleus.

MATCHING Match the type of bond or interaction with its description. a.hydrogen bond c.ionic bond b.van de Waals interaction d.covalent bond -Strong attractive force resulting from the transfer of electrons between atoms

Match the term with its description: a.adhesion c.surface tension b.cohesion d.capillary action -Tendency of water to move in narrow tubes

In a chemical reaction, the product is:

Which of the following atoms would most likely be involved in an ionic bond?

Covalently bonded atoms with similar electronic negativities are:

A stalk of celery is placed in a solution of blue colored dye.After one hour, the leaves have blue fluid in their veins.Which property of water is being demonstrated?

Which of the following elements is NOT responsible for a significant portion of the mass of living organisms?

Figure 2-1 Use the figure below to answer the corresponding question(s). -The difference between the two atoms in Figure 2-1 is:

Which characteristic of water molecules directly contributes to the remarkable "water walking" success of the aquatic insects pictured in the accompanying figure?

MATCHING Match the type of bond or interaction with its description. a.hydrogen bond c.ionic bond b.van de Waals interaction d.covalent bond -In a structural formula this is represented by a straight line

The difference between an electrically neutral atom and an ion is that:

A View of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Dna: the Carrier of Genetic Information

Gene Expression

Gene Regulation

Dna Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters

In a water molecule, because oxygen is more electronegative than hydrogen, the shared electrons are more commonly found around the nucleus than the nucleus.