Advertisement
| isotopes ions and atoms worksheet: The Electron Robert Andrews Millikan, 1917 |
| isotopes ions and atoms worksheet: Biology for AP ® Courses Julianne Zedalis, John Eggebrecht, 2017-10-16 Biology for AP® courses covers the scope and sequence requirements of a typical two-semester Advanced Placement® biology course. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology for AP® Courses was designed to meet and exceed the requirements of the College Board’s AP® Biology framework while allowing significant flexibility for instructors. Each section of the book includes an introduction based on the AP® curriculum and includes rich features that engage students in scientific practice and AP® test preparation; it also highlights careers and research opportunities in biological sciences. |
| isotopes ions and atoms worksheet: Chemistry 2e Paul Flowers, Richard Langely, William R. Robinson, Klaus Hellmut Theopold, 2019-02-14 Chemistry 2e is designed to meet the scope and sequence requirements of the two-semester general chemistry course. The textbook provides an important opportunity for students to learn the core concepts of chemistry and understand how those concepts apply to their lives and the world around them. The book also includes a number of innovative features, including interactive exercises and real-world applications, designed to enhance student learning. The second edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Substantial improvements have been made in the figures, illustrations, and example exercises that support the text narrative. Changes made in Chemistry 2e are described in the preface to help instructors transition to the second edition. |
| isotopes ions and atoms worksheet: A Fresh Look at Phonics, Grades K-2 Wiley Blevins, 2016-06-17 In a Fresh Look at Phonics, Wiley Blevins, author of the blockbuster Phonics from A-Z, explains the 7 ingredients of phonics instruction that lead to the greatest student gains, based on two decades of research in classrooms. For each of these seven must-haves, Wiley shares lessons, routines, word lists, tips for ELL and advanced learners, and advice on pitfalls to avoid regarding pacing, decodable texts, transition time, and more. A Fresh Look at Phonics is the evidence-based solution you have been seeking that ensures all students develop a solid foundation for reading. |
| isotopes ions and atoms worksheet: Chemical Principles Richard Earl Dickerson, Harry B. Gray, Gilbert Pierce Haight, 1979 |
| isotopes ions and atoms worksheet: Chemistry Bruce Averill, Patricia Eldredge, 2007 Emphasises on contemporary applications and an intuitive problem-solving approach that helps students discover the exciting potential of chemical science. This book incorporates fresh applications from the three major areas of modern research: materials, environmental chemistry, and biological science. |
| isotopes ions and atoms worksheet: Chemical Misconceptions Keith Taber, 2002 Part one includes information on some of the key alternative conceptions that have been uncovered by research and general ideas for helping students with the development of scientific conceptions. |
| isotopes ions and atoms worksheet: Quantities, Units and Symbols in Physical Chemistry International Union of Pure and Applied Chemistry. Physical and Biophysical Chemistry Division, 2007 Prepared by the IUPAC Physical Chemistry Division this definitive manual, now in its third edition, is designed to improve the exchange of scientific information among the readers in different disciplines and across different nations. This book has been systematically brought up to date and new sections added to reflect the increasing volume of scientific literature and terminology and expressions being used. The Third Edition reflects the experience of the contributors with the previous editions and the comments and feedback have been integrated into this essential resource. This edition has been compiled in machine-readable form and will be available online. |
| isotopes ions and atoms worksheet: Chemistry Steven S. Zumdahl, Susan A. Zumdahl, 2012 Steve and Susan Zumdahl's texts focus on helping students build critical thinking skills through the process of becoming independent problem-solvers. They help students learn to think like a chemists so they can apply the problem solving process to all aspects of their lives. In CHEMISTRY: AN ATOMS FIRST APPROACH, 1e, International Edition the Zumdahls use a meaningful approach that begins with the atom and proceeds through the concept of molecules, structure, and bonding, to more complex materials and their properties. Because this approach differs from what most students have experienced in high school courses, it encourages them to focus on conceptual learning early in the course, rather than relying on memorization and a plug and chug method of problem solving that even the best students can fall back on when confronted with familiar material. The atoms first organization provides an opportunity for students to use the tools of critical thinkers: to ask questions, to apply rules and models and to |
| isotopes ions and atoms worksheet: Workbook for Radiologic Science for Technologists - E-Book Elizabeth Shields, Stewart C. Bushong, 2012-06-22 Sharpen your radiographic skills and reinforce what you've learned in Bushong's Radiologic Science for Technologists, 10th Edition. Corresponding to the chapters in the textbook, this workbook helps you learn by doing worksheets, crossword puzzles, and math exercises. A Math Tutor section helps you brush up on your math skills. You'll gain the scientific understanding and practical experience necessary to become an informed, confident radiographer. In-depth coverage lets you review and apply all of the major concepts from the text. Over 100 worksheets make it easy to review specific topics, and are numbered according to textbook chapter. Math Tutor exercises provide a great refresher for beginning students or extra practice with decimal and fractional timers, fraction/decimal conversion, solving for desired mAs, and technique adjustments. Penguin boxes summarize relevant information from the textbook, making it easier to review major concepts and do worksheet exercises. New worksheets on digital radiographic technique and the digital image display provide an excellent review of the new textbook chapters. Closer correlation to the textbook simplifies your review. |
| isotopes ions and atoms worksheet: Concepts of Biology Samantha Fowler, Rebecca Roush, James Wise, 2023-05-12 Black & white print. Concepts of Biology is designed for the typical introductory biology course for nonmajors, covering standard scope and sequence requirements. The text includes interesting applications and conveys the major themes of biology, with content that is meaningful and easy to understand. The book is designed to demonstrate biology concepts and to promote scientific literacy. |
| isotopes ions and atoms worksheet: Isotope Dilution Mass Spectrometry Jose Alonso, Pablo Gonzalez, 2019-03-22 Isotope Dilution Mass Spectrometry (IDMS) has become an essential tool in research laboratories and is increasingly used in routine analysis labs (including environmental, food safety and clinical applications). This is the first textbook to present a comprehensive and instructive view of the theory and applications of this growing technique. The main objective of this book is to cover the theory and applications of Isotope Dilution in Analytical Chemistry. The scope is comprehensive to include elemental analysis, speciation analysis, organic analysis and biochemical and clinical analysis together with applications in metabolism studies and traceability of goods. Until now there have been no books published with the same general scope (only book chapters on particular applications). This is a textbook focused at post-graduate level covering the basic knowledge required for doctoral studies in this field. Isotope Dilution Mass Spectrometry will also outline practical applications of interest for routine testing laboratories where isotope dilution procedures are implemented or can be implemented in the future. This unique book covers all the theoretical and practical aspects of Isotope Dilution Mass Spectrometry (IDMS). Due to the increasing application of IDMS in many research laboratories and the increasing implementation of IDMS methodologies in routine testing laboratories, scientists in industry and working in or affiliated to this area will this an invaluable source of information. Concerning the theoretical aspects, the authors present a uniform theoretical background which grows from previous developments in Organic, Speciation and Elemental analysis both in their own laboratory and in other laboratories around the world. This general approach will be simpler and will also include new emerging fields such as quantitative proteomics and metabolism studies. |
| isotopes ions and atoms worksheet: Pearson Chemistry Queensland 11 Skills and Assessment Book Elissa Huddart, 2018-10-04 Introducing the Pearson Chemistry 11 Queensland Skills and Assessment Book. Fully aligned to the new QCE 2019 Syllabus. Write in Skills and Assessment Book written to support teaching and learning across all requirements of the new Syllabus, providing practice, application and consolidation of learning. Opportunities to apply and practice performing calculations and using algorithms are integrated throughout worksheets, practical activities and question sets. All activities are mapped from the Student Book at the recommend point of engagement in the teaching program, making integration of practice and rich learning activities a seamless inclusion. Developed by highly experienced and expert author teams, with lead Queensland specialists who have a working understand what teachers are looking for to support working with a new syllabus. |
| isotopes ions and atoms worksheet: Stable Isotope Ecology Brian Fry, 2007-01-15 A solid introduction to stable isotopes that can also be used as an instructive review for more experienced researchers and professionals. The book approaches the use of isotopes from the perspective of ecological and biological research, but its concepts can be applied within other disciplines. A novel, step-by-step spreadsheet modeling approach is also presented for circulating tracers in any ecological system, including any favorite system an ecologist might dream up while sitting at a computer. The author’s humorous and lighthearted style painlessly imparts the principles of isotope ecology. The online material contains color illustrations, spreadsheet models, technical appendices, and problems and answers. |
| isotopes ions and atoms worksheet: Biological Mass Spectrometry A.L. Burlingame, 2005-11-28 Describes and integrates the techniques of many advances in both chromatographic and mass spectrometric technologies. This book also covers various biophysical applications, such as H/D exchange for study of conformations, protein-protein and protein-metal and ligand interactions. It also describes atto-to-zepto-mole quantitation of 14C and 3H. |
| isotopes ions and atoms worksheet: CPO Focus on Physical Science CPO Science (Firm), Delta Education (Firm), 2007 |
| isotopes ions and atoms worksheet: Foundation Course for NEET (Part 2): Chemistry Class 9 Lakhmir Singh & Manjit Kaur, Our NEET Foundation series is sharply focused for the NEET aspirants. Most of the students make a career choice in the middle school and, therefore, choose their stream informally in secondary and formally in senior secondary schooling, accordingly. If you have decided to make a career in the medical profession, you need not look any further! Adopt this series for Class 9 and 10 today. |
| isotopes ions and atoms worksheet: CBSE Chapterwise Worksheets for Class 9 Gurukul, 30-07-21 Practice Perfectly and Enhance Your CBSE Class 9th preparation with Gurukul’s CBSE Chapterwise Worksheets for 2022 Examinations. Our Practicebook is categorized chapterwise topicwise to provide you in depth knowledge of different concept topics and questions based on their weightage to help you perform better in the 2022 Examinations. How can you Benefit from CBSE Chapterwise Worksheets for 9th Class? 1. Strictly Based on the Latest Syllabus issued by CBSE 2. Includes Checkpoints basically Benchmarks for better Self Evaluation for every chapter 3. Major Subjects covered such as Science, Mathematics & Social Science 4. Extensive Practice with Assertion & Reason, Case-Based, MCQs, Source Based Questions 5. Comprehensive Coverage of the Entire Syllabus by Experts Our Chapterwise Worksheets include ‘’Mark Yourself” at the end of each worksheet where students can check their own score and provide feedback for the same. Also consists of numerous tips and tools to improve problem solving techniques for any exam paper. Our book can also help in providing a comprehensive overview of important topics in each subject, making it easier for students to solve for the exams. |
| isotopes ions and atoms worksheet: Ionic Compounds Claude H. Yoder, 2007-01-09 A practical introduction to ionic compounds for both mineralogists and chemists, this book bridges the two disciplines. It explains the fundamental principles of the structure and bonding in minerals, and emphasizes the relationship of structure at the atomic level to the symmetry and properties of crystals. This is a great reference for those interested in the chemical and crystallographic properties of minerals. |
| isotopes ions and atoms worksheet: Chemistry 2e Paul Flowers, Klaus Theopold, Richard Langley, Edward J. Neth, WIlliam R. Robinson, 2019-02-14 Chemistry 2e is designed to meet the scope and sequence requirements of the two-semester general chemistry course. The textbook provides an important opportunity for students to learn the core concepts of chemistry and understand how those concepts apply to their lives and the world around them. The book also includes a number of innovative features, including interactive exercises and real-world applications, designed to enhance student learning. The second edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Substantial improvements have been made in the figures, illustrations, and example exercises that support the text narrative. Changes made in Chemistry 2e are described in the preface to help instructors transition to the second edition. |
| isotopes ions and atoms worksheet: Introduction to Matter United Kingdom Atomic Energy Authority, 1971 |
| isotopes ions and atoms worksheet: Pearson Chemistry 11 New South Wales Skills and Assessment Book Elissa Huddart, 2017-11-30 The write-in Skills and Assessment Activity Books focus on working scientifically skills and assessment. They are designed to consolidate concepts learnt in class. Students are also provided with regular opportunities for reflection and self-evaluation throughout the book. |
| isotopes ions and atoms worksheet: Chemistry in Context AMERICAN CHEMICAL SOCIETY., 2024-04-11 |
| isotopes ions and atoms worksheet: ACS Style Guide Anne M. Coghill, Lorrin R. Garson, 2006 In the time since the second edition of The ACS Style Guide was published, the rapid growth of electronic communication has dramatically changed the scientific, technical, and medical (STM) publication world. This dynamic mode of dissemination is enabling scientists, engineers, and medicalpractitioners all over the world to obtain and transmit information quickly and easily. An essential constant in this changing environment is the requirement that information remain accurate, clear, unambiguous, and ethically sound.This extensive revision of The ACS Style Guide thoroughly examines electronic tools now available to assist STM writers in preparing manuscripts and communicating with publishers. Valuable updates include discussions of markup languages, citation of electronic sources, online submission ofmanuscripts, and preparation of figures, tables, and structures. In keeping current with the changing environment, this edition also contains references to many resources on the internet.With this wealth of new information, The ACS Style Guide's Third Edition continues its long tradition of providing invaluable insight on ethics in scientific communication, the editorial process, copyright, conventions in chemistry, grammar, punctuation, spelling, and writing style for any STMauthor, reviewer, or editor. The Third Edition is the definitive source for all information needed to write, review, submit, and edit scholarly and scientific manuscripts. |
| isotopes ions and atoms worksheet: Chemistry For Dummies John T. Moore, 2016-05-26 Chemistry For Dummies, 2nd Edition (9781119293460) was previously published as Chemistry For Dummies, 2nd Edition (9781118007303). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. See how chemistry works in everything from soaps to medicines to petroleum We're all natural born chemists. Every time we cook, clean, take a shower, drive a car, use a solvent (such as nail polish remover), or perform any of the countless everyday activities that involve complex chemical reactions we're doing chemistry! So why do so many of us desperately resist learning chemistry when we're young? Now there's a fun, easy way to learn basic chemistry. Whether you're studying chemistry in school and you're looking for a little help making sense of what's being taught in class, or you're just into learning new things, Chemistry For Dummies gets you rolling with all the basics of matter and energy, atoms and molecules, acids and bases, and much more! Tracks a typical chemistry course, giving you step-by-step lessons you can easily grasp Packed with basic chemistry principles and time-saving tips from chemistry professors Real-world examples provide everyday context for complicated topics Full of modern, relevant examples and updated to mirror current teaching methods and classroom protocols, Chemistry For Dummies puts you on the fast-track to mastering the basics of chemistry. |
| isotopes ions and atoms worksheet: Applied Engineering Principles Manual - Training Manual (NAVSEA) Naval Sea Systems Command, 2019-07-15 Chapter 1 ELECTRICAL REVIEW 1.1 Fundamentals Of Electricity 1.2 Alternating Current Theory 1.3 Three-Phase Systems And Transformers 1.4 Generators 1.5 Motors 1.6 Motor Controllers 1.7 Electrical Safety 1.8 Storage Batteries 1.9 Electrical Measuring Instruments Chapter 2 ELECTRONICS REVIEW 2.1 Solid State Devices 2.2 Magnetic Amplifiers 2.3 Thermocouples 2.4 Resistance Thermometry 2.5 Nuclear Radiation Detectors 2.6 Nuclear Instrumentation Circuits 2.7 Differential Transformers 2.8 D-C Power Supplies 2.9 Digital Integrated Circuit Devices 2.10 Microprocessor-Based Computer Systems Chapter 3 REACTOR THEORY REVIEW 3.1 Basics 3.2 Stability Of The Nucleus 3.3 Reactions 3.4 Fission 3.5 Nuclear Reaction Cross Sections 3.6 Neutron Slowing Down 3.7 Thermal Equilibrium 3.8 Neutron Density, Flux, Reaction Rates, And Power 3.9 Slowing Down, Diffusion, And Migration Lengths 3.10 Neutron Life Cycle And The Six-Factor Formula 3.11 Buckling, Leakage, And Flux Shapes 3.12 Multiplication Factor 3.13 Temperature Coefficient... |
| isotopes ions and atoms worksheet: Anatomy & Physiology Lindsay Biga, Devon Quick, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Matern, Katie Morrison-Graham, Jon Runyeon, 2019-09-26 A version of the OpenStax text |
| isotopes ions and atoms worksheet: AP Chemistry For Dummies Peter J. Mikulecky, Michelle Rose Gilman, Kate Brutlag, 2008-11-13 A practical and hands-on guide for learning the practical science of AP chemistry and preparing for the AP chem exam Gearing up for the AP Chemistry exam? AP Chemistry For Dummies is packed with all the resources and help you need to do your very best. Focused on the chemistry concepts and problems the College Board wants you to know, this AP Chemistry study guide gives you winning test-taking tips, multiple-choice strategies, and topic guidelines, as well as great advice on optimizing your study time and hitting the top of your game on test day. This user-friendly guide helps you prepare without perspiration by developing a pre-test plan, organizing your study time, and getting the most out or your AP course. You'll get help understanding atomic structure and bonding, grasping atomic geometry, understanding how colliding particles produce states, and so much more. To provide students with hands-on experience, AP chemistry courses include extensive labwork as part of the standard curriculum. This is why the book dedicates a chapter to providing a brief review of common laboratory equipment and techniques and another to a complete survey of recommended AP chemistry experiments. Two full-length practice exams help you build your confidence, get comfortable with test formats, identify your strengths and weaknesses, and focus your studies. You'll discover how to Create and follow a pretest plan Understand everything you must know about the exam Develop a multiple-choice strategy Figure out displacement, combustion, and acid-base reactions Get familiar with stoichiometry Describe patterns and predict properties Get a handle on organic chemistry nomenclature Know your way around laboratory concepts, tasks, equipment, and safety Analyze laboratory data Use practice exams to maximize your score Additionally, you'll have a chance to brush up on the math skills that will help you on the exam, learn the critical types of chemistry problems, and become familiar with the annoying exceptions to chemistry rules. Get your own copy of AP Chemistry For Dummies to build your confidence and test-taking know-how, so you can ace that exam! |
| isotopes ions and atoms worksheet: AQA GCSE Chemistry Teacher Handbook (Third Edition) Sam Holyman, 2016-04-24 Specifically tailored for the new 2016 AQA GCSE Science (9-1) specifications, this course supports your students on their journey from Key Stage 3 through to success in the new linear GCSE qualifications. The series help students and teachers monitor progress, while supporting the increased demand, maths, and new practical requirements. |
| isotopes ions and atoms worksheet: Geochemistry Francis Albarède, 2009-06-25 Introducing the essentials of modern geochemistry for students across the Earth and environmental sciences, this new edition emphasises the general principles of this central discipline. Focusing on inorganic chemistry, Francis Albarède's refreshing approach is brought to topics that range from measuring geological time to the understanding of climate change. The author leads the student through the necessary mathematics to understand the quantitative aspects of the subject in an easily understandable manner. The early chapters cover the principles and methods of physics and chemistry that underlie geochemistry, to build the students' understanding of concepts such as isotopes, fractionation, and mixing. These are then applied across many of the environments on Earth, including the solid Earth, rivers, and climate, and then extended to processes on other planets. Three new chapters have been added – on stable isotopes, biogeochemistry, and environmental geochemistry. End-of-chapter student exercises, with solutions available online, are also included. |
| isotopes ions and atoms worksheet: Mass Spectrometry Edmond de Hoffmann, Vincent Stroobant, 2001-10-10 Offers a complete overview of the principles, theories and key applications of modern mass spectrometry in this introductory textbook. Following on from the highly successful first edition, this edition is extensively updated including new techniques and applications. All instrumental aspects of mass spectrometry are clearly and concisely described; sources, analysers and detectors. * Revised and updated * Numerous examples and illustrations are combined with a series of exercises to help encourage student understanding * Includes biological applications, which have been significantly expanded and updated * Also includes coverage of ESI and MALDI |
| isotopes ions and atoms worksheet: Introduction to Spectroscopy Donald L. Pavia, Gary M. Lampman, George S. Kriz, James R. Vyvyan, 2015 |
| isotopes ions and atoms worksheet: Molecular Biology of the Cell , 2002 |
| isotopes ions and atoms worksheet: General Chemistry Ralph H. Petrucci, F. Geoffrey Herring, Jeffry D. Madura, Carey Bissonnette, 2010-05 |
| isotopes ions and atoms worksheet: An Introduction to Chemistry - Atoms First Mark Bishop, 2009-09-01 An Introduction to Chemistry is intended for use in beginning chemistry courses that have no chemistry prerequisite. The text was written for students who want to prepare themselves for general college chemistry, for students seeking to satisfy a science requirement for graduation, and for students in health-related or other programs that require a one-semester introduction to general chemistry. |
| isotopes ions and atoms worksheet: Introduction to Chemistry Tracy Poulsen, 2013-07-18 Designed for students in Nebo School District, this text covers the Utah State Core Curriculum for chemistry with few additional topics. |
| isotopes ions and atoms worksheet: Chem& 140 Workbook Mayer, 2020-08-31 |
| isotopes ions and atoms worksheet: Science Spectrum Holt Rinehart & Winston, Holt, Rinehart and Winston Staff, 2003-03 |
| isotopes ions and atoms worksheet: Cyclotron Produced Radionuclides , 2008 This book provides a comprehensive treatment of cyclotrons, with a special emphasis on production of radionuclides. Individual sections are devoted to accelerator technology, theoretical aspects of nuclear reactions, the technology behind targetry, techniques for preparation of targets, irradiation of targets under high beam currents, target processing and target recovery. This book will appeal to scientists and technologists interested in translating cyclotron technology into practice, as well as postgraduate students in this field. |
| isotopes ions and atoms worksheet: Achieve for Interactive General Chemistry Twelve-months Access Macmillan Learning, 2020-06 |
Isotope - Wikipedia
Isotopes are distinct nuclear species (or nuclides) of the same chemical element. They have the same atomic number (number of protons in their nuclei) and position in the periodic table (and …
Isotope | Examples & Definition | Britannica
May 9, 2025 · What is an isotope? An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in the periodic table and nearly identical …
What Is an Isotope? Definition and Examples - Science Notes …
Sep 13, 2019 · Isotopes are forms of an element that have different numbers of neutrons. All isotopes of an element have the same atomic number and number of protons , but they have …
What are Isotopes? | IAEA - International Atomic Energy Agency
Aug 19, 2022 · Isotopes are forms of a chemical element with specific properties. Like everything we see in the world, isotopes are a type of atom, the smallest unit of matter that retains all the …
Isotope Basics | NIDC: National Isotope Development Center
Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, meaning that their mass number, "A", varies. Take …
What are Isotopes? - BYJU'S
The isotopes of a chemical element are a group of atoms that have the same atomic numbers but different mass numbers. This implies that all isotopes of an element have the same number of …
Isotopes - Atomic structure - AQA - GCSE Combined Science
Atomic structure - AQA Isotopes. Atoms consist of a nucleus containing protons and neutrons, surrounded by electrons in shells.
Isotopes: Definition, Meaning, Examples, Uses - Scienly
Sep 22, 2024 · Definition: Atoms of an element which have the same atomic number but different mass numbers are called isotopes of that element. These isotopes are variants of the same …
3.5: Isotopes - Chemistry LibreTexts
Mar 10, 2025 · Atoms that have the same number of protons, and hence the same atomic number, but different numbers of neutrons are called isotopes. All isotopes of an element have the same …
DOE Explains...Isotopes - Department of Energy
Isotopes are members of a family of an element that all have the same number of protons but different numbers of neutrons. The number of protons in a nucleus determines the element’s …
Isotope - Wikipedia
Isotopes are distinct nuclear species (or nuclides) of the same chemical element. They have the same atomic number (number of protons in their …
Isotope | Examples & Definition | Britannica
May 9, 2025 · What is an isotope? An isotope is one of two or more species of atoms of a chemical element with the same atomic number and position in …
What Is an Isotope? Definition and Examples - Sc…
Sep 13, 2019 · Isotopes are forms of an element that have different numbers of neutrons. All isotopes of an element have the same atomic number and …
What are Isotopes? | IAEA - International Atomic Energy A…
Aug 19, 2022 · Isotopes are forms of a chemical element with specific properties. Like everything we see in the world, isotopes are a type of …
Isotope Basics | NIDC: National Isotope Developmen…
Isotopes are atoms of the same element that have the same number of protons (i.e., atomic number, "Z") but a different number of neutrons, …
