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Atoms and elements

Xem 1-20 trên 54 kết quả Atoms and elements
  • (bq) part 1 book “chemistry - a molecular approach” has contents: matter, measurement, and problem solving, atoms and elements, molecules, compounds, and chemical equations, chemical quantities and aqueous reactions, periodic properties of the elements,… and other contents.

    pdf464p tieu_vu15 07-09-2018 12 0   Download

  • The heroine of this book is nature’s simplest atom, the hydrogen atom. With one exception—the helium atom—hydrogen is the mother of all atoms and molecules. The hydrogen atom consists of a single electron and a single proton; the proton is the nucleus of the hydrogen atom and serves as the electron’s anchor. The universe is teeming with hydrogen: every cubic centimeter of dark interstellar space, essentially void of any other known matter,1 contains a few atoms of hydrogen

    pdf288p tuyetmuadong2013 09-04-2013 47 10   Download

  • (bq) part 1 book "complete chemistry for cambridge igcse" has contents: states of matter, separating substances, atoms and elements, atoms combining, reacting masses, and chemical equations, using moles, redox reactions,...and other contents.

    pdf148p bautroibinhyen20 06-03-2017 30 6   Download

  • Both infrared and Raman spectroscopy are extremely powerful analytical techniques for both qualitative and quantitative analysis. However, neither technique should be used in isolation, since other analytical methods may yield important complementary and/or confirmatory information regarding the sample. Even simple chemical tests and elemental analysis should not be overlooked and techniques such as chromatography, thermal analysis, nuclear magnetic resonance, atomic absorption spectroscopy, mass spectroscopy, ultraviolet and visible spectroscopy, etc.

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  • Relations are very important mathematical objects in different fields of theory and applications. In many real applications, for which gradation of relations is immanent, the classical relations are not adequate. Interpolative relations (I-relations) (as fuzzy relations) are the generalization of classical relations so that the value (intensity) of a relation is an element from a real interval [0, 1] and not only from {0, 1} as in the classical case.

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  • Language Integrated Query (LINQ), as well as the C# 3.0 and VB 9.0 language extensions to support it, is the most import single new feature of Visual Studio 2008 and the .NET Framework 3.x. LINQ is Microsoft ’ s first attempt to define a universal query language for a diverse set of in - memory collections of generic objects, entities persisted in relational database tables, and element and attributes of XML documents or fragments, as well as a wide variety of other data types, such as RSS and Atom syndication feeds. Microsoft invested millions of dollars in Anders Hejlsberg...

    pdf676p bachvi 27-09-2010 237 89   Download

  • Atomic Absorption Spectroscopy is an analytical technique used for the qualitative and quantitative determination of the elements present in different samples like food, nanomaterials, biomaterials, forensics, and industrial wastes. The main aim of this book is to cover all major topics which are required to equip scholars with the recent advancement in this field. The book is divided into 12 chapters with an emphasis on specific topics.

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  • There is hardly any book that aims at solving problems typically encountered in the laser field, and this book intends to fill the void. Following some initial exercises related to general aspects in laser physics (Chapt. I), the subsequent problems are organized along the following topics: (i) Interaction of radiation with matter either made of atoms or ions, weakly interacting with surrounding species, or made of more complicated elements such as molecules or semiconductors (Chapters 2 and 3). (ii) Wave propagation in optical media and optical resonators (Chapters 4 and 5)....

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  • Atom, buoyancy, density, element, mass, matter, periodic table, pressure, property, volume,... are the words in the book Matter and its properties. Invite you to consult the text book to grasp the pronunciation and set sentences with the words above.

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  • An element is a chemical substance that is made up of a particular kind of atoms and hence cannot be broken down or transformed by a chemical reaction into a different element, though it can be transmutated into another element through a nuclear reaction. This is so, because all of the atoms in a sample of an element have the same number of protons, though they may be different isotopes, with differing numbers of neutrons.

    pdf918p ngoctu2394 28-11-2012 48 7   Download

  • (bq) part 1 book "world of chemistry" presents the following contents: chemistry - an introduction, matter, chemical foundations - elements, atoms and ions, nomenclature, measurements and calculations, chemical composition, modern atomic theory, chemical bonding,...

    pdf465p thangnamvoiva6 19-07-2016 44 7   Download

  • (bq) part 1 book "chemistry a molecular approach" has contents: matter, measurement, and problem solving; atoms and elements; chemical quantities and aqueous reactions; thermochemistry; periodic properties of the elements; solids and modern materials; liquids, solids, and intermolecular forces,...and other contents.

    pdf20p bautroibinhyen20 06-03-2017 32 7   Download

  • Carbon nanotubes are rolled up graphene sheets with a quasi-one-dimensional structure of nanometer-scale diameters. More than twenty years have passed since the pioneering work on carbon nanotubes by Prof. Iijima in 1991. During all these years, carbon nanotubes have at‐ tracted a lot of attention from physicists, chemists, material scientists, and electronic device engineers because of their excellent structural, electronic, optical, chemical, and mechanical properties.

    pdf0p lyly_5 22-03-2013 45 5   Download

  • (bq) part 2 book "essential chemistry atoms, molecules, and compounds" has contents: the elements, chemical reactions - making molecules, chemical bonds; common compounds, uncommon results.

    pdf81p bautroibinhyen20 06-03-2017 23 5   Download

  • The technique now known as MS has its roots in atomic physics at the beginning of the twentieth century, when it was originally applied by physicists toward answering questions on the nature of atoms. Throughout much of the 1800s, the prevailing wisdom held that atoms were indivisible, that all atoms of a given element had the same mass, and that the masses of all elements were multiples of the mass of hydrogen [7–9].

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  • (bq) part 2 book "elements of physical chemistry" has contents: quantum theory, quantum chemistry - atomic structure, quantum chemistry - the chemical bond, materials - macromolecules and aggregates, solid surfaces,...and other contents.

    pdf309p bautroibinhyen20 06-03-2017 26 4   Download

  • Tài liệu Physical science: Structure of Matter presents about what are the two regions of an atom from the electron cloud model? What do helium, neon, and argon have in common? How do you separate sugar from a sugar-sand mixture? All matter found in nature can be classifi ed as elements, compounds, or mixtures.

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  • This article reviews methods for the determination and identification of trace elements in wine by using atomic absorption spectrometry (AAS). Wine is one of the most widely consumed beverages and strict analytical control of trace elements content is required during the whole process of wine production from grape to the final product.

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  • The complexes Ln(Leu)3ImCl3.3H2O (Ln: Eu, Yb; Leu: L-leucine; Im: imidazole) have been synthesized and characterized by the elemental analysis method , IR spectra and thermal analysis. IR spectra indicated that the rare earth ions are coodinated by both the oxygen atom from the COOgroup and the nitrogen atom from the NH2 group from L-leucine and coodinated with the 3-nitrogen atom for imidazole. The complexes thermal dissociation.

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  • This work aimed at investigating the mechanical properties of boron nitride nanotubes (BN-NTs) under uniaxial tension using atomic finite element method with Tersoff potential. The zigzag and armchair nanotubes with different length and diameter are considered for researching effect on mechanical behavior of BN-NTs.

    pdf9p cumeo3000 01-08-2018 15 0   Download

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