The Heavy Elements

The Heavy Elements PDF
Author: J. E. Fergusson
Publisher: Pergamon
ISBN:
Size: 39.87 MB
Format: PDF, Docs
Category : Gardening
Languages : en
Pages : 614
View: 6663

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This text provides a broad survey of the ten heavier elements of the p-block, which have a number of features in common as well as displaying periodic trends. Full comprehension of the chemistry of the elements is necessary before complete understanding of environmental and health effects is possible. In many texts, however, basic chemistry is avoided as too complex or uninteresting. The author's approach in this case is to use the disciplines of health and environmental science to enhance understanding of the chemistry and to provide students with an integrated approach to the influence of the elements on the world. Information is provided on concentrations, sources and speciation of the heavy elements and their effects on the health of human beings. The text is intended to stimulate students to investigate further aspects of the heavy elements, and contribute to this young but rapidly growing field.

Understanding The Enrichment Of Heavy Elements By The Chemodynamical Evolution Models Of Dwarf Galaxies

Understanding the Enrichment of Heavy Elements by the Chemodynamical Evolution Models of Dwarf Galaxies PDF
Author: Yutaka Hirai
Publisher: Springer
ISBN: 9811378843
Size: 14.46 MB
Format: PDF, Kindle
Category : Science
Languages : en
Pages : 135
View: 766

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This book addresses the mechanism of enrichment of heavy elements in galaxies, a long standing problem in astronomy. It mainly focuses on explaining the origin of heavy elements by performing state-of-the-art, high-resolution hydrodynamic simulations of dwarf galaxies. In this book, the author successfully develops a model of galactic chemodynamical evolution by means of which the neutron star mergers can be used to explain the observed abundance pattern of the heavy elements synthesized by the rapid neutron capture process, such as europium, gold, and uranium in the Local Group dwarf galaxies. The book argues that heavy elements are significant indicators of the evolutionary history of the early galaxies, and presents theoretical findings that open new avenues to understanding the formation and evolution of galaxies based on the abundance of heavy elements in metal-poor stars.

From Transuranic To Superheavy Elements

From Transuranic to Superheavy Elements PDF
Author: Helge Kragh
Publisher: Springer
ISBN: 3319758136
Size: 23.36 MB
Format: PDF
Category : Science
Languages : en
Pages : 106
View: 5857

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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.

The Spectra Of The Heavy Elements

The Spectra of the Heavy Elements PDF
Author: F. S. Tomkins
Publisher:
ISBN:
Size: 24.41 MB
Format: PDF, ePub, Docs
Category : Heavy elements
Languages : en
Pages : 20
View: 7220

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This paper lists the most prominent spectrum lines of the elements from protactinium to americium. In most cases, the spectra were made available because of the necessity of conducting spectrochemical analyses on a number of samples for impurities. Because of limitations of sample size, it was not feasible to perform the analyses with the aid of chemical or physical separations, and so the spectrum of the major constituent was always present. It would be of considerable interest to provide descriptions of the spectra which would be adequate for term analyses leading to energy levels and electron configurations, not only for the spectroscopic interest but also for the assistance they might provide in the correlation of chemical properties of these elements. However, the amounts of labor and sample required for such descriptions are quite formidable, as is evidenced by the fact that the spectra of thorium and uranium are still incompletely analyzed in spite of their having been available in unlimited quantities for many years. To be adequate for a term analysis, the wavelengths must be measured to the third decimal place for as many lines as can be observed over the most extensive wavelength range accessible; Zeeman patterns must be provided; and a temperature or excitation variation must be provided in order to distinguish the various stages of ionization and low levels from high levels. On the other hand, for purposes of identification, it is sufficient to have measurements of the strongest lines of each element, accurate to the first decimal place, covering a representative wavelength region that is convenient for analysis. Since it will probably be some time before data of much value for term analyses are accumulated, the following information was collected for whatever usefulness it might have in spectrochemical analyses.

Environmental Chemistry Of The Heavy Elements

Environmental Chemistry of the Heavy Elements PDF
Author: John S. Thayer
Publisher: VCH Publishers
ISBN:
Size: 77.16 MB
Format: PDF, Kindle
Category : Heavy elements
Languages : en
Pages : 145
View: 3107

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A concise, critical review of roles played by hydrides and alkyls of the heavier elements in the natural environment and the international research taking place in the field. Also discussed is the role that microorganisms play in the formation, distribution and degradation of heavy element compounds, and future possibilities and needs in the field. Annotation copyright by Book News, Inc., Portland, OR

The Inorganic Radiochemistry Of Heavy Elements

The Inorganic Radiochemistry of Heavy Elements PDF
Author: Ivo Zvára
Publisher: Springer
ISBN: 9789048176793
Size: 58.23 MB
Format: PDF, ePub
Category : Technology
Languages : en
Pages : 228
View: 5670

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Written by one of the founders of gas-chromotagraphic methods in radiochemistry, this book attempts a genuine first. It is a discussion of the state of art of heavy element inorganic radiochemistry. It aims to be a real addition to the understanding of this crucial topic. Written as much for newcomers to the field as experts, its goal is also to stimulate wider use of the advantageous gas phase techniques for common elements.