Question 1

Match between columns
                        Premises: Sticking together of like molecules

Accepted Answer

The Answer of capillary action and cohesion and adhesion and is...

Question 2

Match between columns
                        Premises: Strong attractive force resulting from the sharing of electrons between atoms

Accepted Answer

The Answer of covalent bond and hydrogen bond and van is...

Question 3

Match between columns
                        Premises: Very weak attractive force joining nonpolar molecules

Accepted Answer

The Answer of covalent bond and hydrogen bond and ionic is...

Question 4

What is the difference between an electrically neutral atom and an ion?

Accepted Answer

A)  An ion has an unequal number of protons and electrons, while a neutral 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 a neutral 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.

Question 5

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

Question 6

A base is defined as a(n) _____ acceptor.

Accepted Answer

A)  neutron 
B)  electron 
C)  proton 
D)  anion 
E)  cation 
A)  neutron 
B)  electron 
C)  proton 
D)  anion 
E)  cation

Question 7

___________ in the muscle cell are required for muscle contraction.

Accepted Answer

A)  Sodium ions 
B)  Potassium ions 
C)  Calcium ions 
D)  Chloride ions 
E)  Magnesium ions 
A)  Sodium ions 
B)  Potassium ions 
C)  Calcium ions 
D)  Chloride ions 
E)  Magnesium ions

Question 8

Which atom would most likely be involved in an ionic bond?

Accepted Answer

A)  hydrogen 
B)  oxygen 
C)  sodium 
D)  nitrogen 
E)  helium 
A)  hydrogen 
B)  oxygen 
C)  sodium 
D)  nitrogen 
E)  helium

Question 9

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

Accepted Answer

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

Question 10

Match between columns
                        Premises: Strong attractive force resulting from the transfer of electrons between atoms

Accepted Answer

The Answer of ionic bond and covalent bond and van is...

Question 11

Which event illustrates evaporative cooling?

Accepted Answer

A)  a tea kettle whistling 
B)  sweat evaporating from the skin 
C)  ice cubes floating in a glass of water 
D)  a fish not freezing in an ice-covered pond 
E)  salt dissolving in a pot of water with potatoes 
A)  a tea kettle whistling 
B)  sweat evaporating from the skin 
C)  ice cubes floating in a glass of water 
D)  a fish not freezing in an ice-covered pond 
E)  salt dissolving in a pot of water with potatoes

Question 12

A chemical formula shows the types and numbers of atoms in a molecule and their arrangement.

Accepted Answer

A) True 
 B)False

Question 13

Water molecules have a strong tendency to stick to one another, a property known as ___________.

Accepted Answer

A)  adhesion 
B)  capillary action 
C)  cohesion 
D)  surface tension 
E)  osmosis 
A)  adhesion 
B)  capillary action 
C)  cohesion 
D)  surface tension 
E)  osmosis

Question 14

The valence shell of hydrogen or helium is unstable when it contains two electrons.

Accepted Answer

A) True 
 B)False

Question 15

Nitrogen has five electrons in its valence shell. How many electrons does it need to gain to complete its valence shell?

Accepted Answer

A)  one 
B)  two 
C)  three 
D)  seven 
E)  eight 
A)  one 
B)  two 
C)  three 
D)  seven 
E)  eight

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

What is the difference between an electrically neutral atom and an ion?

A base is defined as a(n) _____ acceptor.

___________ in the muscle cell are required for muscle contraction.

Which atom would most likely be involved in an ionic bond?

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

Which event illustrates evaporative cooling?

A chemical formula shows the types and numbers of atoms in a molecule and their arrangement.

Water molecules have a strong tendency to stick to one another, a property known as ___________.

The valence shell of hydrogen or helium is unstable when it contains two electrons.

Nitrogen has five electrons in its valence shell. How many electrons does it need to gain to complete its valence shell?

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

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