Download or read book The Eight New Synthetic Elements written by Glenn Theodore Seaborg and published by . This book was released on 1947 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Eight New Synthetic Elements written by and published by . This book was released on 1947 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In an early continuation of the investigation of the radioactive isotopes of element number 43 (technetium) Segre and Seaborg produced by the deuteron and neutron bombardment of molybdenum the isotope Tc99, which they observed to decay by means of an isomeric transition with a half-life of 6.6 hours to a lower isomeric state with a half-life greater than 40 years. The upper isomeric state of this isotope was observed by Segre and C.S. Wu to be produced in the fission of uranium and more recently R.P. Schumann and also D.C. Lincoln and W.H Sullivan working on the Plutonium Project of the Manhattan District have independently observed the beta-particles of half-life about 10 years due to the lower isomeric state. Later work by E.E. Motta and G.E. Boyd sets a more accurate value of 9.4 x 105 years for this half-life. Since this isotope is formed in rather large amounts, namely, a fission yield of 6.2%, in the slow neutron induced fission of uranium it is now possible to isolate technetium in weighable amounts and in rather substantial quantities. For example, a uranium pile operating at a power level of 105 kw would produce about four grams of technetium, as the isotope T99, per day. With such a long half-life the radioactivity associated with convenient amounts (some mg.) would be so small in intensity as to not create a problem provided reasonable care in handling were exercised.
Download or read book Health Risks of Radon and Other Internally Deposited Alpha Emitters written by National Research Council and published by National Academies Press. This book was released on 1988-02-01 with total page 623 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book describes hazards from radon progeny and other alpha-emitters that humans may inhale or ingest from their environment. In their analysis, the authors summarize in one document clinical and epidemiological evidence, the results of animal studies, research on alpha-particle damage at the cellular level, metabolic pathways for internal alpha-emitters, dosimetry and microdosimetry of radionuclides deposited in specific tissues, and the chemical toxicity of some low-specific-activity alpha-emitters. Techniques for estimating the risks to humans posed by radon and other internally deposited alpha-emitters are offered, along with a discussion of formulas, models, methods, and the level of uncertainty inherent in the risk estimates.
Download or read book Nuclear Science Abstracts written by and published by . This book was released on 1966 with total page 1024 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Recent Scientific and Technical Developments in the Atomic Energy Program of the United States written by U.S. Atomic Energy Commission and published by . This book was released on 1948 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Current List of Medical Literature written by and published by . This book was released on 1948 with total page 1104 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes section, "Recent book acquisitions" (varies: Recent United States publications) formerly published separately by the U.S. Army Medical Library.
Download or read book Abstracts of Declassified Documents written by and published by . This book was released on 1955 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt: Consists of AECD 1-2023 (no. 1-1779 called MDDC).
Download or read book From Transuranic to Superheavy Elements written by Helge Kragh and published by Springer. This book was released on 2018-02-12 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: The story of superheavy elements - those at the very end of the periodic table - is not well known outside the community of heavy-ion physicists and nuclear chemists. But it is a most interesting story which deserves to be known also to historians, philosophers, and sociologists of science and indeed to the general public. This is what the present work aims at. It tells the story or rather parts of the story, of how physicists and chemists created elements heavier than uranium or searched for them in nature. And it does so with an emphasis on the frequent discovery and naming disputes concerning the synthesis of very heavy elements. Moreover, it calls attention to the criteria which scientists have adopted for what it means to have discovered a new element. In this branch of modern science it may be more appropriate to speak of creation instead of discovery. The work will be of interest to scientists as well as to scholars studying modern science from a meta-perspective.
Download or read book American Scientist written by and published by . This book was released on 1942 with total page 638 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Periodic Table written by Eric R. Scerri and published by Oxford University Press, USA. This book was released on 2019 with total page 503 pages. Available in PDF, EPUB and Kindle. Book excerpt: The periodic table of elements is among the most recognizable image in science. It lies at the core of chemistry and embodies the most fundamental principles of science. In this new edition, Eric Scerri offers readers a complete and updated history and philosophy of the periodic table. Written in a lively style to appeal to experts and interested lay-persons alike, The Periodic Table: Its Story and Its Significance begins with an overview of the importance of the periodic table and the manner in which the term "element" has been interpreted by chemists and philosophers across time. The book traces the evolution and development of the periodic table from its early beginnings with the work of the precursors like De Chancourtois, Newlands and Meyer to Mendeleev's 1869 first published table and beyond. Several chapters are devoted to developments in 20th century physics, especially quantum mechanics and and the extent to which they explain the periodic table in a more fundamental way. Other chapters examine the formation of the elements, nuclear structure, the discovery of the last seven infra-uranium elements, and the synthesis of trans-uranium elements. Finally, the book considers the many different ways of representing the periodic system and the quest for an optimal arrangement.
Download or read book Semiannual Report of the Atomic Energy Commission written by U.S. Atomic Energy Commission and published by . This book was released on 1946 with total page 1172 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Elements and the Periodic Table Grades 5 8 written by Theodore S. Abbgy and published by Mark Twain Media. This book was released on 2013-01-02 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aligned to Common Core State Standards, Elements and the Periodic Table present the basics of the Periodic Table in an easy-to-understand, easy-to-master way! It contains fun activities, transparency masters, quizzes, tests, rubrics, grading sheets, and more. From basic elements to table organization, Elements and the Periodic Table is the essential handbook for middle-school science!
Download or read book New Chemistry written by Scientific American and published by . This book was released on 1957 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Model Rules of Professional Conduct written by American Bar Association. House of Delegates and published by American Bar Association. This book was released on 2007 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Model Rules of Professional Conduct provides an up-to-date resource for information on legal ethics. Federal, state and local courts in all jurisdictions look to the Rules for guidance in solving lawyer malpractice cases, disciplinary actions, disqualification issues, sanctions questions and much more. In this volume, black-letter Rules of Professional Conduct are followed by numbered Comments that explain each Rule's purpose and provide suggestions for its practical application. The Rules will help you identify proper conduct in a variety of given situations, review those instances where discretionary action is possible, and define the nature of the relationship between you and your clients, colleagues and the courts.
Download or read book Report to Congress written by U.S. Atomic Energy Commission and published by . This book was released on 1948 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Modern Inorganic Synthetic Chemistry written by Ruren Xu and published by Elsevier. This book was released on 2017-02-11 with total page 810 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern Inorganic Synthetic Chemistry, Second Edition captures, in five distinct sections, the latest advancements in inorganic synthetic chemistry, providing materials chemists, chemical engineers, and materials scientists with a valuable reference source to help them advance their research efforts and achieve breakthroughs. Section one includes six chapters centering on synthetic chemistry under specific conditions, such as high-temperature, low-temperature and cryogenic, hydrothermal and solvothermal, high-pressure, photochemical and fusion conditions. Section two focuses on the synthesis and related chemistry problems of highly distinct categories of inorganic compounds, including superheavy elements, coordination compounds and coordination polymers, cluster compounds, organometallic compounds, inorganic polymers, and nonstoichiometric compounds. Section three elaborates on the synthetic chemistry of five important classes of inorganic functional materials, namely, ordered porous materials, carbon materials, advanced ceramic materials, host-guest materials, and hierarchically structured materials. Section four consists of four chapters where the synthesis of functional inorganic aggregates is discussed, giving special attention to the growth of single crystals, assembly of nanomaterials, and preparation of amorphous materials and membranes. The new edition’s biggest highlight is Section five where the frontier in inorganic synthetic chemistry is reviewed by focusing on biomimetic synthesis and rationally designed synthesis. Focuses on the chemistry of inorganic synthesis, assembly, and organization of wide-ranging inorganic systems Covers all major methodologies of inorganic synthesis Provides state-of-the-art synthetic methods Includes real examples in the organization of complex inorganic functional materials Contains more than 4000 references that are all highly reflective of the latest advancement in inorganic synthetic chemistry Presents a comprehensive coverage of the key issues involved in modern inorganic synthetic chemistry as written by experts in the field
Download or read book The Chemistry of Superheavy Elements written by Matthias Schädel and published by Springer Science & Business Media. This book was released on 2003-04-30 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is the first to treat the chemistry of superheavy elements, including important related nuclear aspects, as a self contained topic. It is written for those – students and novices -- who begin to work and those who are working in this fascinating and challenging field of the heaviest and superheavy elements, for their lecturers, their advisers and for the practicing scientists in the field – chemists and physicists - as the most complete source of reference about our today's knowledge of the chemistry of transactinides and superheavy elements. However, besides a number of very detailed discussions for the experts this book shall also provide interesting and easy to read material for teachers who are interested in this subject, for those chemists and physicists who are not experts in the field and for our interested fellow scientists in adjacent fields. Special emphasis is laid on an extensive coverage of the original literature in the reference part of each of the eight chapters to facilitate further and deeper studies of specific aspects. The index for each chapter should provide help to easily find a desired topic and to use this book as a convenient source to get fast access to a desired topic. Superheavy elements – chemical elements which are much heavier than those which we know of from our daily life – are a persistent dream in human minds and the kernel of science fiction literature for about a century.
