<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0187-893X</journal-id>
<journal-title><![CDATA[Educación química]]></journal-title>
<abbrev-journal-title><![CDATA[Educ. quím]]></abbrev-journal-title>
<issn>0187-893X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Química]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0187-893X2020000300002</article-id>
<article-id pub-id-type="doi">10.22201/fq.18708404e.2020.3.68962</article-id>
<title-group>
<article-title xml:lang="pt"><![CDATA[Caminhos preparatórios de Lewis e seu interesse pelas ligações químicas]]></article-title>
<article-title xml:lang="en"><![CDATA[Preparatory paths for Lewis and their interest in chemical bonds]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lessa Pacheco]]></surname>
<given-names><![CDATA[Leonardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Freitas-Reis]]></surname>
<given-names><![CDATA[Ivoni]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidade Federal de Juiz de Fora Departamento de Química ]]></institution>
<addr-line><![CDATA[Juiz de Fora ]]></addr-line>
<country>Brazil</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidade Federal de Juiz de Fora Departamento de Química ]]></institution>
<addr-line><![CDATA[Juiz de Fora ]]></addr-line>
<country>Brazil</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2020</year>
</pub-date>
<volume>31</volume>
<numero>3</numero>
<fpage>2</fpage>
<lpage>14</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0187-893X2020000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0187-893X2020000300002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0187-893X2020000300002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo Com o objetivo de nortear o leitor no contexto da elaboração da teoria do par compartilhado de Gilbert Newton Lewis (1875-1946), nos debruçamos sobre os documentos originais publicados por ele e as produções disponíveis dos autores que se tornaram relevantes ao desenvolvimento do seu modelo estrutural, chamado de átomo cúbico. A partir da metodologia de pesquisa estudo de caso abordamos tanto a vivencia escolar ou preparação acadêmica de Lewis, para tanto, traçamos os caminhos percorridos por seus predecessores e contemporâneos. Objetivando subsidiar os trabalhos de História da Ciência e Ensino buscamos abordar o pesquisador em seu contexto, bem como a construção do conhecimento da teoria da ligação de G. Lewis. Desde a sua chegada em Berkeley, em 1912, que Lewis se dedicou fortemente a pesquisa. Entre vários outros trabalhos de grande relevância para a química, ele postulou que o átomo neutro tenderia a manter um número par de elétrons em uma Concha ao redor do núcleo, esse número poderia variar se dispondo simetricamente nos oito cantos de um Cubo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In order to guide the reader in the context of the elaboration of Gilbert Newton Lewis&#8217;s shared pair theory (1875-1946), we focus on the original documents published by him and the available productions of the authors that have become relevant to the development of the his structural model, called the cubic atom. From the case study research methodology, we approach Lewis&#8217;s school experience, or academic preparation, we trace the paths traveled by his predecessors and contemporaries. Aiming to subsidize the works of History of Science and Teaching, we seek to approach the researcher in its context, as well as the construction of knowledge of G. Lewis&#8217;s theory of bond. Since his arrival in Berkeley in 1912, Lewis has devoted himself strongly to research. Among several other works of great relevance to chemistry, he postulated that the neutral atom would tend to keep an even number of electrons in a Shell around the nucleus; such a number could vary if arranged symmetrically in the eight corners of a cube.]]></p></abstract>
<kwd-group>
<kwd lng="pt"><![CDATA[Lewis]]></kwd>
<kwd lng="pt"><![CDATA[ligações químicas]]></kwd>
<kwd lng="pt"><![CDATA[compartilhamento eletrônico]]></kwd>
<kwd lng="en"><![CDATA[Lewis]]></kwd>
<kwd lng="en"><![CDATA[chemical bonds]]></kwd>
<kwd lng="en"><![CDATA[electronic sharing]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Abegg]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Die Valenz und das periodische System. Versuch einer Theorie der Molekularverbindungen]]></article-title>
<source><![CDATA[Zeitschrift für anorganische Chemie]]></source>
<year>1904</year>
<volume>39</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>330-80</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aristóteles]]></surname>
</name>
<name>
<surname><![CDATA[Stocks]]></surname>
<given-names><![CDATA[J. L.]]></given-names>
</name>
</person-group>
<source><![CDATA[De caelo]]></source>
<year>1922</year>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bachelard]]></surname>
<given-names><![CDATA[G.]]></given-names>
</name>
</person-group>
<source><![CDATA[A Formação Do Espírito Científico: Contribuição Para Uma Psicanálise Do Conhecimento]]></source>
<year>2005</year>
<publisher-loc><![CDATA[Rio de Janeiro, Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Contraponto Editora LTDA]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bensaude-Vincent]]></surname>
<given-names><![CDATA[B.]]></given-names>
</name>
<name>
<surname><![CDATA[Stengers]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<source><![CDATA[História da Química]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Lisboa, Portugal ]]></publisher-loc>
<publisher-name><![CDATA[Editora Instituto Piaget]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Boyle]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Sceptical Chymist: Or Chymico-Physical, Doubts &amp; Paradoxes]]></source>
<year>1661</year>
<publisher-loc><![CDATA[Londres, Inglaterra ]]></publisher-loc>
<publisher-name><![CDATA[J. Cadwell for J. Crooke]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Brodie]]></surname>
<given-names><![CDATA[B.C.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the Condition of Certains Elements at the Moment of Chemical Change]]></article-title>
<source><![CDATA[Phil. Trans. R. Soc. Lond]]></source>
<year>1850</year>
<volume>140</volume>
<page-range>759-804</page-range></nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Butlerov]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ueber die verschiedenen Erklärungsweisen einiger Fälle von Isomerie]]></article-title>
<source><![CDATA[Zeitschrift für Chemie]]></source>
<year>1863</year>
<volume>2</volume>
<page-range>500-34</page-range></nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Camel]]></surname>
<given-names><![CDATA[T.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Koehler]]></surname>
<given-names><![CDATA[C.B.G.]]></given-names>
</name>
<name>
<surname><![CDATA[Filgueiras]]></surname>
<given-names><![CDATA[C.A.L.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A química orgânica na consolidação dos conceitos de átomo e molécula]]></article-title>
<source><![CDATA[Química Nova]]></source>
<year>2009</year>
<volume>32</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>543-53</page-range><publisher-loc><![CDATA[São Paulo ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Callegario]]></surname>
<given-names><![CDATA[L.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Hygino]]></surname>
<given-names><![CDATA[C.B.]]></given-names>
</name>
<name>
<surname><![CDATA[Alves]]></surname>
<given-names><![CDATA[V.L.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Luna]]></surname>
<given-names><![CDATA[F.J.]]></given-names>
</name>
<name>
<surname><![CDATA[Linhares]]></surname>
<given-names><![CDATA[M.P.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A História da ciência no ensino de química: Uma revisão]]></article-title>
<source><![CDATA[Revista Virtual de Química]]></source>
<year>2015</year>
<volume>7</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>977-91</page-range></nlm-citation>
</ref>
<ref id="B10">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Canizzaro]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sketch of a course of chemical philosophy]]></source>
<year>1910</year>
<publisher-loc><![CDATA[Londres, Inglaterra ]]></publisher-loc>
<publisher-name><![CDATA[University College]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Carus]]></surname>
<given-names><![CDATA[L.T.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Rerum Natura]]></source>
<year>2016</year>
<publisher-loc><![CDATA[Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Editora Ideia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B12">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Coffey]]></surname>
<given-names><![CDATA[Patrick]]></given-names>
</name>
</person-group>
<source><![CDATA[Cathedrals of Science: The Personalities and Rivalries That Made Modern Chemistry]]></source>
<year>2008</year>
<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[Oxford University Press]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B13">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Couper]]></surname>
<given-names><![CDATA[A.S.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On a new chemical theory]]></article-title>
<source><![CDATA[Philosophical Magazine and Journal of Science]]></source>
<year>1858</year>
<volume>16</volume>
<numero>105</numero>
<issue>105</issue>
<page-range>104-16</page-range></nlm-citation>
</ref>
<ref id="B14">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Davy]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[he Bakerian Lecture, on some chemical agencies of electricity]]></article-title>
<source><![CDATA[The Philosophical Transactions of the Royal Society]]></source>
<year>1807</year>
<volume>97</volume>
<page-range>1-56</page-range></nlm-citation>
</ref>
<ref id="B15">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Frankland]]></surname>
<given-names><![CDATA[E.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On a New Series of Organic Bodies Containing Metals]]></article-title>
<source><![CDATA[The Philosophical Transactions of the Royal Society]]></source>
<year>1852</year>
<numero>142</numero>
<issue>142</issue>
<page-range>417-44</page-range></nlm-citation>
</ref>
<ref id="B16">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franco-Patrocinio]]></surname>
<given-names><![CDATA[S.O.]]></given-names>
</name>
</person-group>
<source><![CDATA[Contribuições da História da Ciência para a ressignificação do conceito de Quantidade de Matéria e sua unidade de medida, mol]]></source>
<year>2018</year>
<page-range>1-156</page-range><publisher-name><![CDATA[Universidade Federal de Juiz de Fora]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Franco-Patrocinio]]></surname>
<given-names><![CDATA[S.O.]]></given-names>
</name>
<name>
<surname><![CDATA[Freitas-Reis]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Os livros didáticos de química indicados ao PNLD 2015: A História da Ciência empregada na temática &#8216;Quantidade de Matéria&#8217; e sua unidade, mol]]></article-title>
<source><![CDATA[Holos]]></source>
<year>2017</year>
<volume>2</volume>
<page-range>375-95</page-range></nlm-citation>
</ref>
<ref id="B18">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Freitas-Reis]]></surname>
<given-names><![CDATA[I.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Um mapa da medicina antiga: entre a cura através dos contrários e a cura através dos semelhantes]]></article-title>
<source><![CDATA[Historia de La Medicina y Epistemologia Medica]]></source>
<year>2009</year>
<volume>1</volume>
<numero>1</numero>
<issue>1</issue>
<page-range>01-14</page-range></nlm-citation>
</ref>
<ref id="B19">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Gonçalves-Maia]]></surname>
<given-names><![CDATA[R.]]></given-names>
</name>
</person-group>
<source><![CDATA[Lewis]]></source>
<year>2016</year>
<publisher-loc><![CDATA[São Paulo, Brasil ]]></publisher-loc>
<publisher-name><![CDATA[Editora Livraria da Física]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hildebrand]]></surname>
<given-names><![CDATA[J.H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Gilbert Newton Lewis. 1875-1946]]></article-title>
<source><![CDATA[Obituary Notices of Fellows of the Royal Society]]></source>
<year>1947</year>
<volume>5</volume>
<numero>15</numero>
<issue>15</issue>
<page-range>491-506</page-range></nlm-citation>
</ref>
<ref id="B21">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hudson]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[The History of Chemistry]]></source>
<year>1992</year>
<publisher-loc><![CDATA[Hong Kong ]]></publisher-loc>
<publisher-name><![CDATA[The Macmillan Press LTD]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Kekulé]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Ueber die Constitution und die Metaniorphosen der chemischen Verbindungen und iiber die chemische Natur des Kohlenstoffs]]></article-title>
<source><![CDATA[Annalen Der Emie Und Pharmacie]]></source>
<year>1858</year>
<volume>129</volume>
<numero>106</numero>
<issue>106</issue>
<publisher-name><![CDATA[CVI. Bandes Zweites Heft]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B23">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lewis]]></surname>
<given-names><![CDATA[G.N.]]></given-names>
</name>
</person-group>
<source><![CDATA[Valence and the Structure of Atoms and Molecules]]></source>
<year>1923</year>
<publisher-loc><![CDATA[New York, USA ]]></publisher-loc>
<publisher-name><![CDATA[J. J. Little &amp; lves Company]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Locke]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[An Essay Concerning Human Understanding]]></source>
<year>1991</year>
<publisher-name><![CDATA[Pennsylvania State University]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mackle]]></surname>
<given-names><![CDATA[H.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The Evolution of Valence Theory and Bond Symbolism]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1954</year>
<volume>31</volume>
<numero>12</numero>
<issue>12</issue>
<page-range>618-25</page-range></nlm-citation>
</ref>
<ref id="B26">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mayow]]></surname>
<given-names><![CDATA[J.]]></given-names>
</name>
</person-group>
<source><![CDATA[Medico-Physical Works: Being a Translation of Tractatus Quinque Medico-Physici]]></source>
<year>1907</year>
<publisher-name><![CDATA[Alembic Club]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Neto]]></surname>
<given-names><![CDATA[W.N.A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Noção Clássica de Valência e o Limiar da Representação Estrutural]]></article-title>
<source><![CDATA[Cadernos Temáticos de Química Nova na Escola]]></source>
<year>2007</year>
<numero>07</numero>
<issue>07</issue>
<page-range>13-24</page-range><publisher-loc><![CDATA[São Paulo ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B28">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Nicholson]]></surname>
<given-names><![CDATA[W.]]></given-names>
</name>
<name>
<surname><![CDATA[Carlisle]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Account of the New Electrical or Galvanic Apparatus of Sig. Alexandro Volta and Experiments Performed with the Same]]></article-title>
<source><![CDATA[Journal of Natural Philosophy, Chemistry and the Arts]]></source>
<year>1801</year>
<numero>4</numero>
<issue>4</issue>
<page-range>179-87</page-range></nlm-citation>
</ref>
<ref id="B29">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Porto]]></surname>
<given-names><![CDATA[C.M.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[O atomismo grego e a formação do pensamento físico moderno]]></article-title>
<source><![CDATA[Revista Brasileira de Ensino de Física]]></source>
<year>2013</year>
<volume>35</volume>
<numero>4</numero>
<issue>4</issue>
<page-range>1-11</page-range></nlm-citation>
</ref>
<ref id="B30">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rocha]]></surname>
<given-names><![CDATA[G.R.]]></given-names>
</name>
</person-group>
<source><![CDATA[A história do atomismo: A construção e a desconstrução de uma imagem sintático-semântica do conhecimento científico]]></source>
<year>2006</year>
<publisher-name><![CDATA[Faculdade de Filosofia e Ciências Humanas, Universidade Federal de Minas Gerais]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B31">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Stranges]]></surname>
<given-names><![CDATA[A.N.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Reflections on the Electron Theory of the Chemical Bond: 1900-1925]]></article-title>
<source><![CDATA[Journal of Chemical Education]]></source>
<year>1984</year>
<volume>61</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>185-90</page-range></nlm-citation>
</ref>
<ref id="B32">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Thompson]]></surname>
<given-names><![CDATA[J.J.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cathodes Rays]]></article-title>
<source><![CDATA[Philosophical Magazine]]></source>
<year>1897</year>
<volume>44</volume>
<numero>269</numero>
<issue>269</issue>
<page-range>293-316</page-range><publisher-loc><![CDATA[Londres ]]></publisher-loc>
</nlm-citation>
</ref>
<ref id="B33">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Vidal]]></surname>
<given-names><![CDATA[P. H. O.]]></given-names>
</name>
</person-group>
<source><![CDATA[A História da Ciência nos Livros Didáticos de Química do PNLEM 2007]]></source>
<year>2009</year>
<page-range>1-104</page-range><publisher-loc><![CDATA[São Paulo ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Física, Química, Biociências e Faculdade de Educação, Universidade de São Paulo]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B34">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Volta]]></surname>
<given-names><![CDATA[A.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[On the electricity excited by the mere contact of conducting substances of different kinds]]></article-title>
<source><![CDATA[Philosophical Transactions of the Royal Society]]></source>
<year>1800</year>
<numero>90</numero>
<issue>90</issue>
<page-range>403-31</page-range></nlm-citation>
</ref>
<ref id="B35">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Wollaston]]></surname>
<given-names><![CDATA[W.D.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A Synoptic scale of chemical equivalents]]></article-title>
<source><![CDATA[Philosophical Transactions of the Royal Society]]></source>
<year>1814</year>
<numero>104</numero>
<issue>104</issue>
<page-range>1-22</page-range></nlm-citation>
</ref>
<ref id="B36">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Zanon]]></surname>
<given-names><![CDATA[D.A.V.]]></given-names>
</name>
<name>
<surname><![CDATA[Machado]]></surname>
<given-names><![CDATA[A.T.]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A visão do cotidiano de um cientista retratada por estudantes iniciantes de licenciatura em Química]]></article-title>
<source><![CDATA[Revista Ciência e Cognição]]></source>
<year>2013</year>
<volume>18</volume>
<page-range>46-56</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
