Results 21 to 30 of about 1,505,110 (342)

Classifying chemical elements and particles: from the atomic to the sub-atomic world [PDF]

open access: yesDans The Periodic Table: Into the 21st Century - Second Harry Wiener International Memorial Conference, Banff : Canada (2004), 2003
This paper presents two facets. First, we show that the periodic table of chemical elements can be described, understood and modified (as far as its format is concerned) on the basis of group theory and more specifically by using the group SO(4,2)xSU(2). Second, we show that "periodic tables" also exist in the sub-atomic and sub-nuclear worlds and that
Kibler, Maurice,
arxiv   +2 more sources

On the membership of group 3 of the periodic table: A new approach

open access: diamondTHEORIA. An International Journal for Theory, History and Foundations of Science, 2019
In April 2015, an international team of researchers announced the measurement, for the first time, of the first ionization energy of lawrencium, a superheavy element of atomic number 103. The experimental result, published in the prestigious scientific journal Nature, led to the reopening of a long-standing debate that concerns the elements that should
Juan Camilo Martínez González   +1 more
openaire   +4 more sources

A Simplified Method for Estimating Atomic Number and Neutrons Numbers of Elements Based on Period and Group Numbers in the Periodic Table [PDF]

open access: goldOriental Journal of Chemistry, 2019
This research has proposed formulas, in which the atomic number and neutron numbers to any element in the periodic table are determined according to element position in the periodic table. These formulas have been arranged to fit with periodic system of elements in the IUPAC's Periodic Table.
Laith H. M. Al-Ossmi
openaire   +3 more sources

ChemMend: A Card Game To Introduce and Explore the Periodic Table while Engaging Students’ Interest [PDF]

open access: yes, 2014
Deep knowledge of the periodic table is one of the most important keys to understand the basic principles of Chemistry. Memorizing the elements of the groups and periods is one of the most commonly used strategies to learn the position of each element in
Vicente Martí‐Centelles   +1 more
semanticscholar   +3 more sources

Effect of Concept Mapping Teaching Approach on Students’ Academic Performance in Chemistry in Senior Secondary Schools

open access: yesIndonesian Journal of Educational Research and Technology, 2023
This study investigated the effect of the concept mapping teaching approach on students’ performance in Chemistry in senior secondary schools regarding a periodic table concept.
Torpev Terver Francis   +1 more
doaj   +1 more source

The Use of Educational Board Game as a Supplemental Tool in Learning Periodic Table of Elements Among Senior High School Students

open access: yesAmerican Journal of Education and Technology, 2023
This study aims to assess the effectiveness of the created educational board game as a supplemental tool in learning the core concepts of the periodic table of elements. A quasi-experimental approach was utilized in addressing the objectives of the study
Lalaine N Alejandria   +3 more
semanticscholar   +1 more source

Comparison of Hartree Factor and Density Function Theory in Calculating Coating Constants and NMR Parameters of Chromate and Molecular Complexes with Alanine and Glycine [PDF]

open access: yesInternational Journal of New Chemistry, 2017
Chromium and molybdenum are intermediate elements of a periodic table group, both of which are both low but essential in nutrition because they play a key role in the metabolism of the chemical activity of the body.
Vinod Nguyen
doaj   +1 more source

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