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Examination of the preservice chemistry teachers’ understanding of periodic table concepts
SHS Web of Conferences, 2018 The purpose of this study was to examine the preservice chemistry teachers’ understanding of periodic table concepts and some atomic properties. The study group of this study was comprised of 17 preservice chemistry teachers who were undergraduate ...
Şen Şenol
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AIP Advances, 2021 We report the effect of varying the Y element on the structural, electronic and magnetic properties of Co2YIn (Y = V, Nb, Ti) Heusler compounds using Density Functional Theory (DFT).
Zipporah Muthui +3 more
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Periodic table for topological insulators and superconductors [PDF]
, 2009 Gapped phases of noninteracting fermions, with and without charge conservation and time-reversal symmetry, are classified using Bott periodicity. The symmetry and spatial dimension determines a general universality class, which corresponds to one of the ...
A. Kitaev
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مجلة بغداد للعلوم, 2013 Density Functional Theory (DFT) with B3LYP hybrid exchange-correlation functional and 3-21G basis set and semi-empirical methods (PM3) were used to calculate the energies (total energy, binding energy (Eb), molecular orbital energy (EHOMO-ELUMO), heat ...
Baghdad Science Journal
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The Mnemonic Correction Becomes Meaningful Through Focus Group Discussion in Chemistry Learning
JTK (Jurnal Tadris Kimiya), 2022 One of the concerns in the learning process is the meaning of writing mnemonics to help students memorize chemistry concepts. The research aimed to correct mnemonics in learning presentation by prospective chemistry teachers' students to be meaningful ...
Sri Winarni, Syahrial Syahrial
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LASER ELEMENTAL ANALYZER LASER-Z FOR SOILS, ORES, MINERALS AND MINING AND CHEMICAL RAW MATERIAL [PDF]
Минералогия, 2016 SciAsp Company, a leading world producer of portable analytical equipment, presents new series of laser analyzers Laser-Z. Portable mining and geological analyzers Laser-Z will perform field elemental analysis for almost any group of the Periodic Table.
E. Skorina
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Molecules, 2022 The current discussion on whether scandium, yttrium and lanthanum should represent Group 3 in the Periodic Table or whether lutetium should replace lanthanum in the group has prompted us to further explore the structural chemistry of the Group 3 elements
Simon A. Cotton +4 more
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The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada
Population Ecology, EarlyView.We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
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Population Ecology, EarlyView.We investigate the seasonal dynamics of two freshwater snails, Biomphalaria straminea and Melanoides tuberculata, in artificial reservoirs of the Brazilian semiarid region. Despite regulated hydrology, B. straminea exhibited strong seasonal fluctuations associated with dry periods, while M. tuberculata maintained stable populations throughout the year,
Lucas Henrique Sousa da Silva +6 more
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On the Importance of σ–Hole Interactions in Crystal Structures
Crystals, 2021 Elements from groups 14–18 and periods 3–6 commonly behave as Lewis acids, which are involved in directional noncovalent interactions (NCI) with electron-rich species (lone pair donors), π systems (aromatic rings, triple and double bonds) as well as ...
Antonio Frontera, Antonio Bauzá
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