Results 1 to 10 of about 1,186,113 (254)

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

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

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

Home - About - Disclaimer - Privacy