Chemistry an introduction to general organic and biological chemistry

Overview of An Introduction to General, Organic, and Biological Chemistry

The text book titled Chemistry: An introduction to general organic and biological chemistry is designed to help the general concepts of organic chemistry. This book is designed for majors and non-majors students of chemistry and biological sciences to learn the application of organic chemistry and chemistry of biological systems.  

Periodic Table of Elements

Representative elements

114

Transition elements

†Actinides

1 Group

1A

2 Group

2A

3 3B

4 4B

5 5B

6 6B

7 7B

8

9 8B

10

11 1B

12 2B

*Lanthanides

111

112

1 3

4

11

12

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

236

5

6

7

8

9

10

13

14

15

16

17

18

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54 86

85

84

83

82

81

80

79

78

77

76

75

74

73

72

57

56

55 87

88

89

104

105

106

107

108

109

110

58

59

60

61

62

63

64

65

66

67

68

69

70

71

90

91

92

93

94

95

96

97

98

99

100

101

102

103

(272)

1 6.

4 83.

(99)

131 (222)

(210) (294)

(209)

132 (223)

(226)

(227)

(261)

(262)

(266)

(264)

(265)

(268)

(271)

(145)

(237)

(244)

(243)

(247)

(247)

(251)

(252)

(257)

(258)

(259)

(262)

H Li

Be

Na MgK

Ca Sc

Ti

V

Cr Mn Fe Co Ni Cu Zn

He

B

C

N

O

F

Ne

Al

Si

P

S

Cl Ar

Ga Ge As Se Br

Kr

Rb Sr

Y

Zr Nb Mo

Tc

Ru Rh Pd Ag Cd In

Sn Sb

Te

I

Xe

Cs Ba La Hf

Ta

W Re Os

Ir

Pt Au Hg Tl Pb Bi Po At Rn

Fr Ra Ac Rf Db Sg Bh Hs Mt

Ce Pr Nd Pm Sm

Eu Gd Tb Dy Ho Er Tm Yb Lu

Th Pa

U Np Pu Am Cm Bk Cf Es Fm Md No Lr

Ds Rg

113

Periodnumber

1 2 3 4 5 6 7

13 Group

3A

14 Group

4A

15 Group

5A

16 Group

6A

17 Group

7A

18 Group

8A

Alkalimetals

Noblegases

Alkalineearthmetals

Halogens

Metals

Metalloids

Nonmetals

115

(289)

(285)

(286)

(289)

116

118

117

(293)

(294)

Cn Nh Fl Mc Lv

Og

Ts

CHEMISTRY

An Introduction to General, Organic,

and Biological Chemistry

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Library of Congress Cataloging-in-Publication Data

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ISBN-10: 0-134-42135- ISBN-13: 978-0-134-42135-

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v

x Contents

CHEMISTRY LINK TO HEALTH Testing for Glucose 452 13. 6 Disaccharides 453 CHEMISTRY LINK TO HEALTH How Sweet Is My Sweetener? 455 CHEMISTRY LINK TO HEALTH Blood Types and Carbohydrates 456 13. 7 Polysaccharides 459 CLINICAL UpdATE Kate’s Program for Type 2 Diabetes 4 61 Concept Map 462 Chapter Review 462 Summary of Carbohydrates 463 Summary of Reactions 464 Key Terms 464 Core Chemistry Skills 465 Understanding the Concepts 465 Additional Practice Problems 466 Challenge Problems 467 Answers 468

14

Carboxylic Acids,

Esters, Amines,

and Amides 470

CAREER Environmental Health Practitioner 470 CLINICAL UPDATE Testing Soil and Water Samples for Chemicals 470 14. 1 Carboxylic Acids 471 14. 2 Properties of Carboxylic Acids 473 CHEMISTRY LINK TO HEALTH Carboxylic Acids in Metabolism 476 14. 3 Esters 477 CHEMISTRY LINK TO HEALTH Salicylic Acid from a Willow Tree 479 CHEMISTRY LINK TO THE ENVIRONMENT Plastics 480 14. 4 Hydrolysis of Esters 482 14. 5 Amines 484 CHEMISTRY LINK TO HEALTH Amines in Health and Medicine 486 CHEMISTRY LINK TO THE ENVIRONMENT Alkaloids: Amines in Plants 490 14. 6 Amides 491

Some Important Alcohols and Phenols 402 CHEMISTRY LINK TO HEALTH Ethers as Anesthetics 404 12. 2 Properties of Alcohols 405 CHEMISTRY LINK TO HEALTH Hand Sanitizers 407 12. 3 Aldehydes and Ketones 408 CHEMISTRY LINK TO HEALTH Some Important Aldehydes and Ketones 412 12. 4 Reactions of Alcohols, Thiols, Aldehydes, and Ketones 414 CHEMISTRY LINK TO HEALTH Oxidation of Alcohol in the Body 417 CLINICAL UpdATE Diana’s Skin Protection Plan 421 Concept Map 421 Chapter Review 422 Summary of Naming 423 Summary of Reactions 423 Key Terms 423 Core Chemistry Skills 424 Understanding the Concepts 424 Additional Practice Problems 425 Challenge Problems 427 Answers 427

COMBINING IDEAS from Chapters 10 to 12 430

13

Carbohydrates 432

CAREER Diabetes Nurse 432

CLINICAL UPDATE Kate’s Program for Type 2 Diabetes 432 13. 1 Carbohydrates 433 13. 2 Chiral Molecules 436 CHEMISTRY LINK TO HEALTH Enantiomers in Biological Systems 441 13. 3 Fischer Projections of Monosaccharides 443 CHEMISTRY LINK TO HEALTH Hyperglycemia and Hypoglycemia 445 13. 4 Haworth Structures of Monosaccharides 446 13. 5 Chemical Properties of Monosaccharides 450

Contents xi

Additional Practice Problems 542 Challenge Problems 542 Answers 543 COMBINING IDEAS from Chapters 13 to 15 546

16

Amino Acids,

Proteins,

and Enzymes 548

CAREER Physician Assistant 548 CLINICAL UPDATE Jeremy’s Diagnosis and Treatment for Sickle-Cell Anemia 548 16. 1 Proteins and Amino Acids 549 16. 2 Proteins: Primary Structure 553 CHEMISTRY LINK TO HEALTH Essential Amino Acids and Complete Proteins 555 CHEMISTRY LINK TO HEALTH Polypeptides in the Body 557 16. 3 Proteins: Secondary, Tertiary, and Quaternary Structures 558 CHEMISTRY LINK TO HEALTH Protein Secondary Structures and Alzheimer’s Disease 560 CHEMISTRY LINK TO HEALTH Sickle-Cell Anemia 565 16. 4 Enzymes 566 CHEMISTRY LINK TO HEALTH Isoenzymes as Diagnostic Tools 569 16. 5 Factors Affecting Enzyme Activity 571 CLINICAL UpdATE Jeremy’s Diagnosis and Treatment for Sickle-Cell Anemia 576 Concept Map 577 Chapter Review 577 Key Terms 578 Core Chemistry Skills 579 Understanding the Concepts 579 Additional Practice Problems 580 Challenge Problems 581 Understanding Protein Structures 581 Answers 581

Amides in Health and Medicine 494 CLINICAL UpdATE Testing Soil and Water Samples for Chemicals 497 Concept Map 498 Chapter Review 498 Summary of Naming 499 Summary of Reactions 499 Key Terms 501 Core Chemistry Skills 501 Understanding the Concepts 501 Additional Practice Problems 502 Challenge Problems 504 Answers 505

15

Lipids 509

CAREER Clinical Lipid Specialist 509

CLINICAL UPDATE Rebecca’s Program to Lower Cholesterol 509 15. 1 Lipids 510 15. 2 Fatty Acids 511 CHEMISTRY LINK TO HEALTH Omega-3 Fatty Acids in Fish Oils 515 15. 3 Waxes and Triacylglycerols 517 15. 4 Chemical Properties of Triacylglycerols 521 CHEMISTRY LINK TO HEALTH Converting Unsaturated Fats to Saturated Fats: Hydrogenation 522 15. 5 Phospholipids 525 CHEMISTRY LINK TO HEALTH Infant Respiratory Distress Syndrome (IRDS) 529 15. 6 Steroids: Cholesterol, Bile Salts, and Steroid Hormones 530 CHEMISTRY LINK TO HEALTH Anabolic Steroids 534 15. 7 Cell Membranes 536 CLINICAL UpdATE Rebecca’s Program to Lower Cholesterol 538 Concept Map 539 Chapter Review 539 Summary of Reactions 540 Key Terms 540 Core Chemistry Skills 541 Understanding the Concepts 541

xiii

Applications and Activities

xiv Applications and Activities

  • 1 Chemistry in Our Lives Brief Contents
  • 2 Chemistry and Measurements
  • 3 Matter and Energy
  • 4 Atoms and Elements
  • 5 Nuclear Chemistry
  • 6 Ionic and Molecular Compounds
  • 7 Chemical Quantities and Reactions
  • 8 Gases
  • 9 Solutions
  • 10 Acids and Bases and Equilibrium
  • 11 Introduction to Organic Chemistry: Hydrocarbons
  • 12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones
  • 13 Carbohydrates
  • 14 Carboxylic Acids, Esters, Amines, and Amides
  • 15 Lipids
  • 16 Amino Acids, Proteins, and Enzymes
  • 17 Nucleic Acids and Protein Synthesis
  • 18 Metabolic Pathways and ATP Production
  • Radon in Our Homes CHEMISTRY LINK TO HEALTH
    1. 3 Radiation Measurement
  • Radiation and Food CHEMISTRY LINK TO HEALTH
    1. 4 Half-Life of a Radioisotope
  • Dating Ancient Objects CHEMISTRY LINK TO THE ENVIRONMENT
    1. 5 Medical Applications Using Radioactivity
  • Brachytherapy CHEMISTRY LINK TO HEALTH
    1. 6 Nuclear Fission and Fusion
  • Nuclear Power Plants CHEMISTRY LINK TO THE ENVIRONMENT
  • Cardiac Imaging Using a Radioisotope CLINICAL UpdATE
  • Concept Map
  • Chapter Review
  • Key Terms
  • Core Chemistry Skills
  • Understanding the Concepts
  • Additional Practice Problems
  • Challenge Problems
  • Answers
  • Compounds Ionic and Molecular
  • CAREER Pharmacy Technician
  • CLINICAL UPDATE Compounds at the Pharmacy
  • 6 Ions: Transfer of Electrons
  • Some Important Ions in the Body CHEMISTRY LINK TO HEALTH
  • 6 Ionic Compounds
  • 6 Naming and Writing Ionic Formulas
  • 6 Polyatomic Ions
  • 6 Molecular Compounds: Sharing Electrons
  • 6 Lewis Structures for Molecules
  • 6 Electronegativity and Bond Polarity
  • 6 Shapes of Molecules
  • 6 Polarity of Molecules and Intermolecular Forces
  • Compounds at the Pharmacy CLINICAL UpdATE
  • Concept Map
  • Chapter Review
  • Key Terms
  • Core Chemistry Skills
  • Challenge Problems Contents vii
  • Answers
  • COMBINING IDEAS from Chapters 1 to
  • Elements Atoms and
  • CAREER Farmer
  • CLINICAL UPDATE Improving Crop Production
  • 4 Elements and Symbols
  • Toxicity of Mercury CHEMISTRY LINK TO HEALTH
  • 4 The Periodic Table
  • Elements Essential to Health CHEMISTRY LINK TO HEALTH
  • 4 The Atom
  • 4 Atomic Number and Mass Number
  • Many Forms of Carbon CHEMISTRY LINK TO THE ENVIRONMENT
  • 4 Isotopes and Atomic Mass
  • 4 Electron Energy Levels
  • Biological Reactions to UV Light CHEMISTRY LINK TO HEALTH
  • 4 Trends in Periodic Properties
  • Improving Crop Production CLINICAL UpdATE
  • Concept Map
  • Chapter Review
  • Key Terms
  • Core Chemistry Skills
  • Understanding the Concepts
  • Additional Practice Problems
  • Challenge Problems
  • Answers
  • Chemistry Nuclear
  • CAREER Radiation Technologist
  • Radioisotope CLINICAL UPDATE Cardiac Imaging Using a
    1. 1 Natural Radioactivity
    1. 2 Nuclear Reactions
  • Understanding the Concepts viii Contents
  • Additional Practice Problems
  • Challenge Problems
  • Answers
  • COMBINING IDEAS from Chapters 4 to
  • and Reactions Chemical Quantities
  • CAREER Exercise Physiologist
  • Fitness CLINICAL UPDATE Improving Natalie’s Overall
  • 7 The Mole
    1. 2 Molar Mass
    1. 3 Calculations Using Molar Mass
    1. 4 Equations for Chemical Reactions
    1. 5 Types of Chemical Reactions
  • Monoxide Incomplete Combustion: Toxicity of Carbon
    1. 6 Oxidation–Reduction Reactions
  • 7 Mole Relationships in Chemical Equations
    1. 8 Mass Calculations for Chemical Reactions
  • 7 Energy in Chemical Reactions
  • Cold Packs and Hot Packs CHEMISTRY LINK TO HEALTH
  • Improving Natalie’s Overall Fitness CLINICAL UpdATE
  • Concept Map
  • Chapter Review
  • Key Terms
  • Core Chemistry Skills
  • Understanding the Concepts
  • Additional Practice Problems
  • Challenge Problems
  • Answers
  • Gases
  • CAREER Respiratory Therapist
  • CLINICAL UPDATE Exercise-Induced Asthma
  • 8 Properties of Gases
  • Measuring Blood Pressure CHEMISTRY LINK TO HEALTH
  • 8 Pressure and Volume (Boyle’s Law)
  • Pressure–Volume Relationship in Breathing CHEMISTRY LINK TO HEALTH
  • 8 Temperature and Volume (Charles’s Law)
  • 8 Temperature and Pressure (Gay-Lussac’s Law)
  • 8 The Combined Gas Law
  • 8 Volume and Moles (Avogadro’s Law)
  • 8 Partial Pressures (Dalton’s Law)
  • Hyperbaric Chambers CHEMISTRY LINK TO HEALTH
  • Exercise-Induced Asthma CLINICAL UpdATE
  • Concept Map
  • Chapter Review
  • Key Terms
  • Core Chemistry Skills
  • Understanding the Concepts
  • Additional Practice Problems
  • Challenge Problems
  • Answers
  • Solutions
  • CAREER Dialysis Nurse
  • Failure CLINICAL UPDATE Using Dialysis for Renal
  • 9 Solutions
  • Water in the Body CHEMISTRY LINK TO HEALTH
  • 9 Electrolytes and Nonelectrolytes
  • Electrolytes in Body Fluids CHEMISTRY LINK TO HEALTH
  • 9 Solubility
  • in Body Fluids Gout and Kidney Stones: A Problem of Saturation
  • 9 Solution Concentrations
  • 9 Dilution of Solutions
  • 9 Properties of Solutions
  • Kidney Dialysis by the Kidneys and the Artificial
  • Using Dialysis for Renal Failure CLINICAL UpdATE
  • Identifying Oxidized and Reduced Substances
  • Using Mole–Mole Factors
  • Converting Grams to Grams
  • Using the Gas Laws
  • Calculating Partial Pressure
  • Using Solubility Rules
  • Calculating Concentration
  • Using Concentration as a Conversion Factor
  • Identifying Conjugate Acid–Base Pairs
  • Using Le Châtelier’s Principle
  • Calculating [H 3 O+] and [OH-] in Solutions
  • Writing Equations for Reactions of Acids and Bases
  • Titration Calculating Molarity or Volume of an Acid or Base in a
  • Naming and Drawing Alkanes
  • Hydration Writing Equations for Hydrogenation and
  • Identifying Functional Groups
  • Naming Alcohols and Phenols
  • Naming Aldehydes and Ketones
  • Writing Equations for the Dehydration of Alcohols
  • Writing Equations for the Oxidation of Alcohols
  • Identifying Chiral Molecules
  • Carbohydrates Identifying D and L Fischer Projections for
  • Drawing Haworth Structures
  • Naming Carboxylic Acids
  • Hydrolyzing Esters
  • Forming Amides
  • Identifying Fatty Acids
  • Drawing Structures for Triacylglycerols
  • and Saponification of a Triacylglycerol Drawing the Products for the Hydrogenation, Hydrolysis,
  • Identifying the Steroid Nucleus
  • Physiological pH Drawing the Structure for an Amino Acid at
  • Quaternary Structures of Proteins Identifying the Primary, Secondary, Tertiary, and
  • Describing Enzyme Action
  • Writing the Complementary DNA Strand
  • Writing the mRNA Segment for a DNA Template
  • Writing the Amino Acid for an mRNA Codon
  • Identifying the Compounds in Glycolysis
  • Describing the Reactions in the Citric Acid Cycle
  • Calculating the ATP Produced from Glucose
  • (b Oxidation) Calculating the ATP from Fatty Acid Oxidation
  • Identifying Place Values KEY MATH SKILLS
  • Using Positive and Negative Numbers in Calculations
  • Calculating Percentages
  • Solving Equations
  • Interpreting Graphs
  • Writing Numbers in Scientific Notation
  • Rounding Off
  • Calculating pH from [H 3 O+]
  • Calculating [H 3 O+] from pH
  • Counting Significant Figures CORE CHEMISTRY SKILLS
  • Using Significant Figures in Calculations
  • Using Prefixes
  • Writing Conversion Factors from Equalities
  • Using Conversion Factors
  • Using Density as a Conversion Factor
  • Identifying Physical and Chemical Changes
  • Converting between Temperature Scales
  • Using Energy Units
  • Using the Heat Equation
  • Calculating Heat for Change of State
  • Counting Protons and Neutrons
  • Writing Atomic Symbols for Isotopes
  • Writing Electron Arrangements
  • Identifying Trends in Periodic Properties
  • Drawing Lewis Symbols
  • Writing Nuclear Equations
  • Using Half-Lives
  • Writing Positive and Negative Ions
  • Writing Ionic Formulas
  • Naming Ionic Compounds
  • Compounds Writing the Names and Formulas for Molecular
  • Drawing Lewis Structures
  • Using Electronegativity
  • Predicting Shape
  • Forces Identifying Polarity of Molecules and Intermolecular
  • Converting Particles to Moles
  • Calculating Molar Mass
  • Using Molar Mass as a Conversion Factor
  • Balancing a Chemical Equation
  • Classifying Types of Chemical Reactions
  • Solving Equations Interactive Videos
  • Conversion Factors
  • Chemical vs. Physical Changes
  • Rutherford’s Gold-Foil Experiment
  • Bombardment Writing Equations for an Isotope Produced by
  • Half-Lives
  • Problem 7
  • Kinetic Molecular Theory
  • Solutions
  • Titration of an Acid
  • Naming Alkanes
  • Addition to an Asymmetric Bond
  • Oxidation of Alcohols
  • Chirality
  • Membrane Structure
  • Different Levels of Protein Structure
  • Protein Synthesis

xvi

preface

NEW! TEST feature added in the margin encourages students to solve related Practice Problems to practice retrieval of content for exams. • NEW! Interactive Videos give students the experi- ence of step-by-step problem solving for problems from the text. • NEW! Review topics placed in the margin at the begin- ning of a Section list the Key Math Skills and Core Chemistry Skills from the previous chapters, which pro- vide the foundation for learning new chemistry princi- ples in the current chapter. • UPDATED! Solution Guides are now included in selected Sample Problems. • UPDATED! Key Math Skills review basic math relevant to the chemistry the students are learning throughout the text. A Key Math Skill Review at the end of each chapter summarizes and gives additional examples. • UPDATED! Core Chemistry Skills identify the key chemical principles in each chapter that are required for successfully learning chemistry. A Core Chemistry Skill Review at the end of each chapter helps reinforce the material and gives additional examples. • UPDATED! Analyze the Problem features included in the Solutions of the Sample Problems strengthen critical- thinking skills and illustrate the breakdown of a word problem into the components required to solve it. • UPDATED! Practice Problems , Sample Problems , and art demonstrate the connection between the chemistry being discussed and how these skills will be needed in professional experience. • UPDATED! Combining Ideas features offer sets of inte- grated problems that test students’ understanding and develop critical thinking by integrating topics from two or more previous chapters.

Chapter Organization of the Thirteenth Edition In each textbook I write, I consider it essential to relate every chemical concept to real-life issues. Because a chemistry course may be taught in different time frames, it may be difficult to cover all the chapters in this text. However, each chapter is a complete package, which allows some chapters to be skipped or the order of presentation to be changed.

Chapter 1, Chemistry in Our Lives, discusses the Scien- tific Method in everyday terms, guides students in developing a study plan for learning chemistry, with a section of Key Math

Welcome to the thirteenth edition of An Introduction to General, Organic, and Biological Chemistry. This chemistry text was written and designed to help you prepare for a career in a health-related profession, such as nursing, dietetics, respiratory therapy, and environmental and agricultural science. This text assumes no prior knowledge of chemistry. My main objective in writing this text is to make the study of chemistry an engaging and a positive experience for you by relating the structure and behavior of matter to its role in health and the environment. This new edition introduces more problem-solving strategies, more problem-solving guides, new Analyze the Problem with Con- nect features, new Try It First and Engage features, conceptual and challenge problems, and new sets of combined problems. It is my goal to help you become a critical thinker by understanding scientific concepts that will form a basis for making important decisions about issues concerning health and the environment. Thus, I have utilized materials that

• help you to learn and enjoy chemistry • relate chemistry to careers that interest you • develop problem-solving skills that lead to your success in chemistry • promote learning and success in chemistry

New for the Thirteenth Edition

New and updated features have been added throughout this thirteenth edition, including the following:

NEW AND UPDATED! Chapter Openers provide engag- ing clinical stories in the health profession and introduce the chemical concepts in each chapter. • NEW! Clinical Updates added at the end of each Chapter continue the story of the chapter opener and describe the follow-up treatment. • NEW! Engage feature in the margin asks students to think about the paragraph they are reading and to test their understanding by answering the Engage question, which is related to the topic. • NEW! Try It First precedes the Solution section of each Sample Problem to encourage the student to work on the problem before reading the given Solution. • NEW! Connect feature added to Analyze the Problem boxes indicates the relationships between Given and Need. • NEW! Clinical Applications added to Practice Problems show the relevance between the chemistry content and medicine and health. • NEW! Strategies for Learning Chemistry are added that utilize successful ways to study and learn chemistry.

Preface xvii

Skills that reviews the basic math, including scientific notation, needed in chemistry calculations.

• The Chapter Opener tells the story of a murder and fea- tures the work and career of forensic scientists. • A new Clinical Update feature describes the forensic evidence that helps to solve the murder and includes Clinical Applications. • “Scientific Method: Thinking Like a Scientist” is expanded to include law and theory. • Writing Numbers in Scientific Notation is now a new Section. • An updated Section titled Studying and Learning Chem- istry expands the discussion of strategies that improve learning and understanding of content. • Key Math Skills are: Identifying Place Values, Using Positive and Negative Numbers in Calculations, Cal- culating Percentages, Solving Equations, Interpreting Graphs, and Writing Numbers in Scientific Notation.

Chapter 2, Chemistry and Measurements, looks at meas- urement and emphasizes the need to understand numerical relationships of the metric system. Significant figures are dis- cussed in the determination of final answers. Prefixes from the metric system are used to write equalities and conversion fac- tors for problem-solving strategies. Density is discussed and used as a conversion factor.

• The Chapter Opener tells the story of a patient with high blood pressure and features the work and career of a reg- istered nurse. • A new Clinical Update describes the patient’s status and follow-up visit with his doctor. • New photos, including an endoscope, propranolol tab- lets, cough syrup, people exercising, a urine dipstick, and a pint of blood, are added to improve visual introduc- tion to clinical applications of chemistry. Previous art is updated to improve clarity. • Sample Problems relate problem solving to health- related topics such as the measurements of blood volume, omega-3 fatty acids, radiological imaging, body fat, cholesterol, and medication orders. • New Clinical Applications feature questions about meas- urements, daily values for minerals and vitamins, equali- ties and conversion factors for medications. • New material illustrates how to count significant figures in equalities and in conversion factors used in a problem setup. • A new Key Math Skill, Rounding Off, has been added. • Core Chemistry Skills are: Counting Significant Figures, Using Significant Figures in Calculations, Using Pre- fixes, Writing Conversion Factors from Equalities, Using Conversion Factors, and Using Density as a Conversion Factor.

Chapter 3, Matter and Energy, classifies matter and states of matter, describes temperature measurement, and discusses energy, specific heat, energy in nutrition, and changes of state. Physical and chemical properties and physical and chemical changes are discussed. • The chapter opener describes diet and exercise for an overweight adolescent at risk for type 2 diabetes and fea- tures the work and career of a dietitian. • A new Clinical Update describes the new diet prepared with a dietitian for weight loss. • Practice Problems and Sample Problems include high temperatures used in cancer treatment, the energy pro- duced by a high-energy shock output of a defibrillator, body temperature lowering using a cooling cap, ice bag therapy for muscle injury, and energy values for food. • Core Chemistry Skills are: Identifying Physical and Chemical Changes, Converting between Temperature Scales, Using Energy Units, Using the Heat Equation, and Calculating Heat for Change of State. • The interchapter problem set, Combining Ideas from Chapters 1 to 3, completes the chapter.

Chapter 4, Atoms and Elements, introduces elements and atoms and the periodic table. The names and symbols for the newest elements 113, Nihonium, Nh, 115, Moscovium, Mc, 117, Tennessine, Ts, and 118, Oganesson, Og, are added to the periodic table. Electron arrangements are written for atoms and the trends in periodic properties are described. Atomic numbers and mass numbers are determined for isotopes. The most abun- dant isotope of an element is determined by its atomic mass. • The Chapter Opener and Follow Up feature the work and career of a farmer. • A new Clinical Update describes the improvement in crop production by the farmer. • Atomic number and mass number are used to calculate the number of protons and neutrons in an atom. • The number of protons and neutrons are used to calculate the mass number and to write the atomic symbol for an isotope. • The trends in periodic properties are described for valence electrons, atomic size, ionization energy, and metallic character. • Core Chemistry Skills are: Counting Protons and Neutrons, Writing Atomic Symbols for Isotopes, Writing Electron Arrangements, Identifying Trends in Periodic Properties, and Drawing Lewis Symbols.

Chapter 5, Nuclear Chemistry, looks at the types of radia- tion emitted from the nuclei of radioactive atoms. Nuclear equations are written and balanced for both naturally occurring radioactivity and artificially produced radioactivity. The half- lives of radioisotopes are discussed, and the amount of time for a sample to decay is calculated. Radioisotopes important in the