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Author: Hans K. Kugler
Publisher: Springer Science & Business Media
ISBN: 3662058685
Category : Science
Languages : en
Pages : 305
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Book Description
Astatine is - besides radon and francium - the only natural radioelement which only has short-Lived isotopes, thereby excluding experiments with . . weighable" amounts of the element. This implies that all available data on physics and chemistry of this element are 12 16 based on experiments on the tracer scale with 10- to 10- g - and this will also not change in future because no longer-Lived isotopes as yet known are to be expected. Due to the fact that the only isotope of At occurring in the natural decay series, 219At, results from the 0. 005% a-branching of 223Fr which itself is produced by the only 1. 38% a-branching of 227 Ac - a member of the 235U series - there is no chance to recover substantial amounts of 219At from natural sources for sCientific research of At. All studies, therefore, are being done with the isotopes 209At to 211At having half-lives in the few hours region and being obtained by irradiation of bismuth with a-particles via (a,xn) reactions or by proton irradiation of heavy elements via spallation reactions. The mostly used isotope is 7. 22 h 211At. The fast separation of the obtained At isotopes is no very difficult procedure and is either being done by wet adsorption-precipitation techniques or making use of its high volatility by destilling in air.
Author: Hans K. Kugler
Publisher: Springer Science & Business Media
ISBN: 3662058685
Category : Science
Languages : en
Pages : 305
Get Book Here
Book Description
Astatine is - besides radon and francium - the only natural radioelement which only has short-Lived isotopes, thereby excluding experiments with . . weighable" amounts of the element. This implies that all available data on physics and chemistry of this element are 12 16 based on experiments on the tracer scale with 10- to 10- g - and this will also not change in future because no longer-Lived isotopes as yet known are to be expected. Due to the fact that the only isotope of At occurring in the natural decay series, 219At, results from the 0. 005% a-branching of 223Fr which itself is produced by the only 1. 38% a-branching of 227 Ac - a member of the 235U series - there is no chance to recover substantial amounts of 219At from natural sources for sCientific research of At. All studies, therefore, are being done with the isotopes 209At to 211At having half-lives in the few hours region and being obtained by irradiation of bismuth with a-particles via (a,xn) reactions or by proton irradiation of heavy elements via spallation reactions. The mostly used isotope is 7. 22 h 211At. The fast separation of the obtained At isotopes is no very difficult procedure and is either being done by wet adsorption-precipitation techniques or making use of its high volatility by destilling in air.
Author: Lawrence S. Germain
Publisher:
ISBN:
Category : Astatine
Languages : en
Pages : 10
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Author:
Publisher: PediaPress
ISBN:
Category :
Languages : en
Pages : 31
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Book Description
Author: William W. Hay
Publisher: Springer
ISBN: 331927404X
Category : Nature
Languages : en
Pages : 834
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Book Description
This book is a thorough introduction to climate science and global change. The author is a geologist who has spent much of his life investigating the climate of Earth from a time when it was warm and dinosaurs roamed the land, to today's changing climate. Bill Hay takes you on a journey to understand how the climate system works. He explores how humans are unintentionally conducting a grand uncontrolled experiment which is leading to unanticipated changes. We follow the twisting path of seemingly unrelated discoveries in physics, chemistry, biology, geology, and even mathematics to learn how they led to our present knowledge of how our planet works. He explains why the weather is becoming increasingly chaotic as our planet warms at a rate far faster than at any time in its geologic past. He speculates on possible future outcomes, and suggests that nature itself may make some unexpected course corrections. Although the book is written for the layman with little knowledge of science or mathematics, it includes information from many diverse fields to provide even those actively working in the field of climatology with a broader view of this developing drama. Experimenting on a Small Planet is a must read for anyone having more than a casual interest in global warming and climate change - one of the most important and challenging issues of our time. This new edition includes actual data from climate science into 2014. Numerous powerpoint slides allow lecturers and teachers to more effectively use the book as a basis for climate change education.
Author:
Publisher: Arihant Publications India limited
ISBN: 9325792400
Category :
Languages : en
Pages : 689
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Book Description
Author: Aadithi Dalvi
Publisher: Arihant Publications India limited
ISBN: 9326190323
Category :
Languages : en
Pages : 671
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Book Description
1. The book deals with Chemistry subject for MHT CET entrances 2. The guide divided according to XI & XII Syllabus 3. Each chapter is accompanied with 3 level exercises 4. Complete coverage to 21 years’ previous years’ Solved Papers 5. Selected questions are given from 2021 online exam for quick revision Maharashtra Common Entrance Test or MHT CET is a state-level examination conducted by Maharashtra State Cell to give admission to the eligible candidates in Engineering and Pharmacy courses offered by Government & Private institutions across the state. The revised & updated edition of ‘MHT CET Prep Guide 2022’ deals with the subject of Chemistry that has been carefully designed to foster the quality of enhancement in the course of preparation for the upcoming paper. This book comprehensively covers all the chapters of Class XI & XII as per the latest reduced syllabus prescribed by the board. Providing a simple but effective approach to the subject matter, each chapter is well explained with detailed theories in a student friendly manner. For the complete practice of the exam, there are three-level exercises in each chapter ensuring step by step enhancement, Coverage to Previous 21 years’ MHT CET Questions to get the exact idea of questions asked in exam and lastly, 5 Mock Tests are provided for quick revision of the concepts. With this edition of the book, you can hold the assurance of getting through the upcoming exam of MHT CET 2022. TOC Class XI: Some Basic Concepts of Chemistry, Structure of Atom, Chemical Bonding, Redox Reactions, Elements of Group 1 and 2, States of Matter: Gaseous and Liquid States, Adsorption and Colloids, Basic Principles of Organic Chemistry, Hydro Carbons, Solid States, Solutions, Iconic Equillibria, Chemical Thermodynamics, Electrochemistry, Chemical Kinetics, Elements of Groups 16, 17 and 18, Transition and Inner Transition Elements, Coordination Compounds, Halogen Derivatives, Alcohols, phenols and ethers, Aldehydes, ketones and carboxylic acid, Amines, Biomolecules, Introduction to Polymer Chemistry, Green Chemistry and Nanochemistry, Mock Test (1-5 ), Selected Questions (Online) MHTCET2021
Author: David C. Ayres
Publisher: Routledge
ISBN: 1351455451
Category : Science
Languages : en
Pages : 344
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Book Description
A quick reference for information on chemicals of environmental importance, this dictionary has been carefully compiled and designed to make it useful for students. About 600 substances are covered in alphabetically arranged entries: these include some 70 pesticides. Entries vary in detail depending on individual aspects, but in general they include: composition/structure; physical propertied; sources; environmentally relevant reactions and pathways; detection; and toxic effects and regulatory limits. Many entries include short case histories. Immediately relevant sources are quoted for individual entries and a bibliography of principle publications and texts for further reading is included.
Author: Steven M. Kaplan
Publisher: John Wiley & Sons
ISBN: 1118802187
Category : Science
Languages : en
Pages : 980
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Book Description
Wiley’s English-Spanish, Spanish-English CHEMISTRY DICTIONARY Translates more than 75,000 terms in chemistry and its related disciplines With more than 35,000 new entries added, the Second Edition of Wiley’s English-Spanish, Spanish-English Chemistry Dictionary has been completely updated and revised, now translating more than 75,000 terms. You’ll find coverage of all areas of chemistry, including chemical biology, biochemistry, biotechnology, and nanochemistry. There’s also coverage of relevant terms in related disciplines of science and engineering. The dictionary’s straightforward, intuitive format makes it quick and easy for you to translate terms from either English to Spanish or Spanish to English. Acclaimed lexicographer Steven M. Kaplan has provided Spanish and English language equivalents that are clear and accurate. Moreover, he has reviewed the current chemistry literature in order to include recently coined terms. Wiley’s English-Spanish, Spanish-English Chemistry Dictionary features: A wealth of information in one portable volume Entries covering the broad range of subdisciplines within chemistry English and Spanish language equivalents of thousands of chemical compounds Terms and phrases in related areas of science and engineering User-friendly format that takes you directly to the precise term needed Current with all the latest terms and phrases used in contemporary chemistry, this Second Edition remains indispensable for researchers, educators, students, and translators working in the field of chemistry. Este diccionario sirve igualmente bien para las personas que hablan el Inglés como lengua primaria o el Español como lengua primaria.
Author: Allen J. Bard
Publisher: Routledge
ISBN: 1351414747
Category : Science
Languages : en
Pages : 849
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Book Description
The best available collection of thermodynamic data!The first-of-its-kind in over thirty years, this up-to-date book presents the current knowledgeon Standard Potentials in Aqueous Solution.Written by leading international experts and initiated by the IUPAC Commissions onElectrochemistry and Electroanalytical Chemistry, this remarkable work begins with athorough review of basic concepts and methods for determining standard electrodepotentials. Building upon this solid foundation, this convenient source proceeds to discussthe various redox couples for every known element.The chapters of this practical, time-saving guide are organized in order of the groups ofelements on the periodic table, for easy reference to vital material . AND each chapteralso contains the fundamental chemistry of elements ... numerous equations of chemicalreactions .. . easy-to-read tables of thermodynamic data . . . and useful oxidation-statediagrams.Standard Potentials in Aqueous Solution is an ideal, handy reference for analytical andphysical chemists, electrochemists, electroanalytical chemists, chemical engineers, biochemists,inorganic and organic chemists, and spectroscopists needing information onreactions and thermodynamic data in inorganic chemistry . And it is a valuable supplementarytext for undergraduate- and graduate-level chemistry students.
Author:
Publisher:
ISBN:
Category : Weights and measures
Languages : en
Pages : 806
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Book Description
