Results 1 to 10 of about 1,207,935 (298)

ANÁLISE DA ABORDAGEM HISTÓRICA PARA A TABELA PERIÓDICA EM LIVROS DE QUÍMICA GERAL PARA O ENSINO SUPERIOR USADOS NO BRASIL NO SÉCULO XX

open access: goldQuímica Nova, 2015
The aim of this paper was to analyze the historical approaches to the periodic table in general chemistry textbooks used in Brazilian universities in the twentieth century.
Helena S. A. Leite, Paulo A. Porto
doaj   +2 more sources

Recreation of the periodic table with an unsupervised machine learning algorithm [PDF]

open access: yesScientific Reports, 2021
In 1869, the first draft of the periodic table was published by Russian chemist Dmitri Mendeleev. In terms of data science, his achievement can be viewed as a successful example of feature embedding based on human cognition: chemical properties of all ...
Minoru Kusaba   +4 more
doaj   +2 more sources

The Bioinorganic Periodic Table

open access: yesCHIMIA, 2019
Life depends on metals. While carbon, in terms of abundance and versatility, is considered THE element of life, the vast variety and diversity of the chemistry taking place in living organisms could not be achieved without metal ions.
Eva Freisinger, Roland K.O. Sigel
doaj   +4 more sources

Glass: Home of the Periodic Table [PDF]

open access: yesFrontiers in Chemistry, 2020
Glass is the most common material around us, and humankind uses it every day for more than 5000 years. However, from the chemical point of view, glass is the only material that could represent almost all elements of the Periodic Table inside itself ...
Georgiy Shakhgildyan   +4 more
doaj   +2 more sources

Are History Aspects Related to the Periodic Table Considered in Ethiopian Secondary School Chemistry Textbooks?

open access: greenSubstantia, 2019
The aim of this study is to evaluate Ethiopian secondary school chemistry textbooks with respect to presentation of HPS related aspects of the periodic table. We focus on how the textbooks approached the periodic table as a conceptual tool for organizing
Gebrekidan Mebrahtu   +1 more
doaj   +2 more sources

PubChem Periodic Table and Element pages: improving access to information on chemical elements from authoritative sources [PDF]

open access: yesChemistry Teacher International, 2020
PubChem (https://pubchem.ncbi.nlm.nih.gov) is one of the top five most visited chemistry web sites in the world, with more than five million unique users per month (as of March 2020).
Kim Sunghwan   +4 more
doaj   +2 more sources

Periodic Table Updated [PDF]

open access: bronzeC&EN Global Enterprise, 2016
With the addition of four new elements, the seventh row of the periodic table is officially full, the International Union of Pure & Applied Chemistry (IUPAC) announced on Dec. 30. A joint committee made up of IUPAC and the International Union of Pure & Applied Physics gave its stamp of approval, and IUPAC temporarily gave element 113 the name ununtrium
JYLLIAN KEMSLEY
openalex   +2 more sources

Home - About - Disclaimer - Privacy