Results 1 to 10 of about 1,167,989 (235)
Teachers’ misconception concerning valence and valency in chemistry
Science Education International, 2021 A study on the misconceptions developed or held by teachers related to the two terms valence and valency was undertaken. A total of 48 teachers (26 males and 22 females) teaching the chemistry component of science subject to 14- to 16-year-old students ...
Raghubir Singh Sindhu
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Neptunium Valence Chemistry in Anion Exchange Processing [PDF]
, 2003 The current anion resin in use in HB-Line Phase II, Reillex{trademark} HPQ, was tested in the laboratory under expected plant conditions for Np processing and was found to load between 50 and 70 g Np per liter of resin. Losses varied from 0.2 to 15 percent depending on a number of parameters. Hydrazine in the feed at 0.02 to 0.05 M appeared to keep the
E. Kyser
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Valence and Core Photoelectron Spectra of Aqueous
Molecules, 2023 The I3− molecule is known to undergo substantial structural reorganization upon solvation by a protic solvent, e.g., water. However, the details of this process are still controversially discussed in the literature.
Vladislav Kochetov +4 more
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On the crystal chemistry of normal valence compounds [PDF]
Acta Crystallographica, 1959 A new classification of the crystal structures of normal valence compounds with simple atomic ratios is discussed. This classification is based on two atomic parameters which gauge the directional properties of the bonds in a compound. The parameters are (1) the average principal quantum number, ~, of the valence shell of the component atoms and (2 ...
E. Mooser, W. B. Pearson
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Interfacial chemistry and valence band offset between GaN and Al2O3 studied by X-ray photoelectron spectroscopy [PDF]
, 2013 The interface region between Ga-face n-type GaN and Al2O3 dielectric (achieved via atomic-layer deposition or ALD) is investigated by X-ray photoelectron spectroscopy (XPS).
Tianli Duan, Jisheng Pan, D. S. Ang
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Reactions in Crystalline Lattices: Chemistry of Lower Valence States of Lanthanides [PDF]
The Journal of Chemical Physics, 1970 Reduction of rare-earth (RE) ions to lower valence states in ionic crystals is described in terms of the equilibrium distribution theory for the (alkali halide):RE2+ and (alkaline-earth halide):RE3+ systems. Thermoluminescence glow curves of radiation-reduced CaF2:RE3+ systems reveal that the reoxidation of the divalent ions apparently occurs through ...
Fong, Francis K. +2 more
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Inorganic Chemistry, 2016 An aqueous synthetic route at 95 °C is developed to reach selectively three scarcely reported vanadium oxyhydroxides. Häggite V2O3(OH)2, Duttonite VO(OH)2, and Gain's hydrate V2O4(H2O)2 are obtained as nanowires, nanorods, and nanoribbons, with sizes 1 ...
Julie Besnardiere +9 more
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Tuning electronic correlations in transition metal pnictides: Chemistry beyond the valence count [PDF]
, 2015 The effects of electron-electron correlations on the low-energy electronic structure and their relationship with unconventional superconductivity are central aspects in the research on iron-based pnictide superconductors.
Elia Razzoli +16 more
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Applications of molecular orbital-valence bond theory in chemistry [PDF]
Pure and Applied Chemistry, 1983 Abstract
N. D. Epiotis
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