ISSN 0187-893X       ISSNE 1870-8404
Domingo, 25 de Junio del 2017

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Guide authors of the current issue Volumen XXVIII, Número 1, January de 2017 Volumen XXVII, Número 4, October de 2016 Volumen XXVII, Número 3, July de 2016 Volumen XXVII, Número 2, April de 2016
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Papers of the current issue

Identificando los enfoques de investigacin para que la educacin qumica progrese como un campo de estudio

Keith S. Taber

La educacin qumica se est estableciendo como un campo acadmico con su propia identidad y caractersticas. Este artculo sugiere dos importantes principios que deben tomarse en cuenta al hacer la pregunta: cul debera ser el enfoque de la investigacin en educacin qumica (Chemical Education Research)? El primer principio aplica una tipologa que divide la investigacin en las clases de qumica como inherente (esencial), incrustada (involucrada) o colateral (incidental), de acuerdo con el grado en el que la investigacin se conceptualiza en trminos de asuntos que surgen en la ensenanza y el aprendizaje de contenido especfico en el rea de la qumica. Para el desarrollo del campo de la educacin qumica es importante que se favorezca la investigacin en educacin qumica clasificada como inherente. El segundo principio se relaciona con qu es lo que hace que un campo sea cientfico. Aqu se sugiere que la investigacin necesita tener una naturaleza programtica, de forma que el campo no solamente acumule ms estudios, sino que progrese al permitir que los nuevos investigadores sean inducidos al campo y construyan sobre el trabajo existente.

Whatever happened to Linnett double-quartet (LDQ) theory?

William B. Jensen

This paper discuss one recent episode in the history of chemistry which currently has received little attention in the scientific realism debate: the rise and apparent fall of an approximate model of the chemical bond known as Linnett double-quartet theory. In 1961 Linnett published a paper in the Journal of the American Chemical Society entitled A Modification of the Lewis-Langmuir Octet Rule in which he suggested certain changes in G. N. Lewiss original views on the role of the electron pair in covalent bond formation based on an explicit consideration of the effects of electron spin -- a property of the electron unknown to Lewis in 1916. Although his theory produced outstanding predictions, it is now forgotten.

Silver plating: An electrochemical activity to integrate diff erent sciences with the art

Ramón Lagos, Juan Camus

Electrochemical silver is an interesting activity of teaching for the integration of electrochemistry, chemistry, physics and art. Craftsman needs to produce a bright layer of silver on his works and so chooses to use electrolyte of diverse nature. The cost and the degree of are important that an on determination of choice the electrolyte be . Silver usually is find in the complex state and the study of the different complexes represents an interesting activity in the chemistry of coordination compounds. It is important to establish a relation between the brightness of the coating and the stability of the complex compound of silver and therefore of its structure. This paper correlates characteristics of electrolyte with the silver brightness electrochemically deposited on copper and nickel. In order to quantify the silver brightness, the reflectivity measurements were made with the luxmeter.

Using Avogadro as molecular viewer and builder with Odontology fi rst year students in a course of General and Organic Chemistry

Celia Torres Quezada, Patricia Varela Gangas, María Verónica Frías, Patricio Flores-Morales

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Where the Teaching of Materials science should be directed to?

Jose G. Carriazo, Martha J. Saavedra, Manuel F. Molina

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The environmental dimension of experimentation in Chemistry Teaching: Use considerations from the holistic metric green star

Fábio Peres Goncalves, Santiago Francisco Yunesa, Renata Isabelle Guaita, Carlos Alberto Marques, Tania C.M. Pires, J. Ricardo M. Pinto, Adélio A.S.C. Machado

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How to charge the cell phone by walking?

Ana Martínez Vázquez

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