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      <title>Línea del tiempo  by Alan Aguirre</title>
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      <description>Equipo 1
</description>
      <language>en-us</language>
      <pubDate>2021-08-03 13:07:46 UTC</pubDate>
      <lastBuildDate>2023-04-12 06:57:09 UTC</lastBuildDate>
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      <item>
         <title>Edad contemporánea siglo XVIII</title>
         <author>alan1130aguirre</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667825855</link>
         <description><![CDATA[<div><br></div><ul><li>La estructura del átomo</li><li>Se desarrolla la moderna tabla periódica</li><li>Nace la química nuclear y la cuántica.</li><li>El descubrimiento de los elementos como sustancias que no pueden ser compuesta en otras sustancias más simples.&nbsp;</li><li>La ley de conservación de la masa enunciada.</li></ul>]]></description>
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         <pubDate>2021-08-03 13:36:27 UTC</pubDate>
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      </item>
      <item>
         <title>3,500 a 2,500 a.C - Se efectuaron las primeras aleaciones (Bronce)</title>
         <author></author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667826335</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-03 13:36:54 UTC</pubDate>
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      </item>
      <item>
         <title>Edad Moderna</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667828632</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-03 13:39:20 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667828632</guid>
      </item>
      <item>
         <title> Lavoisier promulga la ley de la conservación de la masa en 1785</title>
         <author>emihelo2017</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667829181</link>
         <description><![CDATA[<div>Emiliano</div>]]></description>
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         <pubDate>2021-08-03 13:39:46 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667829181</guid>
      </item>
      <item>
         <title>Representantes de la edad contemporánea</title>
         <author>alan1130aguirre</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667829948</link>
         <description><![CDATA[<ul><li>joseph priestley.</li><li>antoine lavoisier.</li><li>jacques charles.</li><li>joseph proust.</li><li>alessandro volta.</li></ul><div><br></div>]]></description>
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         <pubDate>2021-08-03 13:40:35 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667829948</guid>
      </item>
      <item>
         <title>Alquimia </title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667831572</link>
         <description><![CDATA[<div>Las raíces experimentales de la química, nacieron&nbsp; con la alquimia. Pretendía descubrir los elementos constitutivos del Universo, encontrar la piedra filosofal que convirtiese en oro todos los metales. &nbsp;<br><br></div>]]></description>
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         <pubDate>2021-08-03 13:42:09 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667831572</guid>
      </item>
      <item>
         <title>Edad Antigua. 100 d.C Lucrecio escribe &quot;De rerum natura&quot; donde explica el concepto del átomo</title>
         <author>rebeveandez</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667833190</link>
         <description><![CDATA[<div>Rebeca</div>]]></description>
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         <pubDate>2021-08-03 13:43:41 UTC</pubDate>
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      </item>
      <item>
         <title>1520 -  Iatroquímica</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667833483</link>
         <description><![CDATA[<div>El comienzo de la iatroquímica, se usa la medicina sintética para curar enfermedades.</div>]]></description>
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         <pubDate>2021-08-03 13:43:58 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667833483</guid>
      </item>
      <item>
         <title>Edad Antigua. 10.000 a.C, Egipto, India y China experimentan con técnicas de alfarería.</title>
         <author>rebeveandez</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667836817</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-03 13:47:23 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667836817</guid>
      </item>
      <item>
         <title>El 20 de abril de 1902, Marie y Pierre Curie logran aislar la sustancia radioactiva de cloruro de radio</title>
         <author>emihelo2017</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667837224</link>
         <description><![CDATA[<div>Emiliano</div>]]></description>
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         <pubDate>2021-08-03 13:47:46 UTC</pubDate>
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      </item>
      <item>
         <title>Flogisto  (1660-1734)</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667837289</link>
         <description><![CDATA[<div>Georg Ernest propuso el principio de inflamabilidad y aseguraba que había una sustancia, a la que le puso por nombre "flogisto", que provocaba la combustión de las cosas.&nbsp;<br><br><br></div>]]></description>
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         <pubDate>2021-08-03 13:47:50 UTC</pubDate>
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      </item>
      <item>
         <title>1709 - Construcción del primer termómetro</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667838018</link>
         <description><![CDATA[<div>Gabriel Daniel Fahrenheit construye un termómetro de alcohol y, mas tarde un termómetro de mercurio.<br><br></div>]]></description>
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         <pubDate>2021-08-03 13:48:34 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667838018</guid>
      </item>
      <item>
         <title>8.000 a.C, civilizaciones antiguas desarrollan la fermentación.</title>
         <author>rebeveandez</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667839388</link>
         <description><![CDATA[<div>Rebeca</div>]]></description>
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         <pubDate>2021-08-03 13:49:56 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667839388</guid>
      </item>
      <item>
         <title>John Dalton (1766-1844)</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667841239</link>
         <description><![CDATA[<div>John Dalton propudo un modelo atómico basado en los conocimientos de esa época, consideró el átomo como una esfera indivisible.<br><br></div>]]></description>
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         <pubDate>2021-08-03 13:51:39 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667841239</guid>
      </item>
      <item>
         <title>2.000 a.C, China descubre el electromagnetismo.</title>
         <author>rebeveandez</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667841485</link>
         <description><![CDATA[<div>Rebeca</div>]]></description>
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         <pubDate>2021-08-03 13:51:56 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667841485</guid>
      </item>
      <item>
         <title>El descubrimiento de los rayos x de Wilhelm Conrad Roentgen en 1895 </title>
         <author>emihelo2017</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667842846</link>
         <description><![CDATA[<div>Emiliano</div>]]></description>
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         <pubDate>2021-08-03 13:53:18 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667842846</guid>
      </item>
      <item>
         <title>1860 - 1870 Elementos de la tabla periódica </title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667845859</link>
         <description><![CDATA[<div>Durante el siglo XIX ya se habían descubierto cerca de 60 elementos y determinado sus masas atómicas. Dmitry Mendeleyev formuló la tabla periódica para que resultara más sencilla la identificación de los elementos conocidos. <br><br></div>]]></description>
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         <pubDate>2021-08-03 13:56:19 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667845859</guid>
      </item>
      <item>
         <title>450 a.C, Aristóteles concibe los 4 elementos como componentes del todo.</title>
         <author>rebeveandez</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667846434</link>
         <description><![CDATA[<div>Rebeca</div>]]></description>
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         <pubDate>2021-08-03 13:56:55 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667846434</guid>
      </item>
      <item>
         <title>Oxigeno (1733-1804)</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667849469</link>
         <description><![CDATA[<div>Joseph Priestley descubrió el aire "desflogisticado" que es ahora con conocido como Oxígeno.</div>]]></description>
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         <pubDate>2021-08-03 13:59:53 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667849469</guid>
      </item>
      <item>
         <title>1920 - Descubrimiento del protón y neutrón</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667849898</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-03 14:00:20 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667849898</guid>
      </item>
      <item>
         <title>1923 -  Insulina</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667892869</link>
         <description><![CDATA[<div>Producción de insulina para tratar la diabetes.</div>]]></description>
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         <pubDate>2021-08-03 14:40:28 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1667892869</guid>
      </item>
      <item>
         <title>1856 - Rayos catódicos</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668884648</link>
         <description><![CDATA[<div>J.J Thomson descubrió los rayos catódicos, formados por electrones. </div>]]></description>
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         <pubDate>2021-08-04 13:15:30 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668884648</guid>
      </item>
      <item>
         <title>DESDE 2004. La ingeniería genética experimenta con células madre.</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668890171</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-04 13:19:57 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668890171</guid>
      </item>
      <item>
         <title>Watson y Crick proponen el modelo de doble hélice del ADN. 1953</title>
         <author>alan1130aguirre</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668905456</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://www.cshl.edu/wp-content/uploads/2013/04/Crick_Watson_DNAmodel.jpg" />
         <pubDate>2021-08-04 13:34:41 UTC</pubDate>
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      </item>
      <item>
         <title>Paul Hermann Muller descubre las propiedades como veneno de insectos del DDT en 1939 </title>
         <author>emihelo2017</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908181</link>
         <description><![CDATA[<div>Emiliano </div>]]></description>
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         <pubDate>2021-08-04 13:37:33 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908181</guid>
      </item>
      <item>
         <title>1,200 a.C - Taputti: Es mencionada en una tableta cuneiforme hallada en Mesopotamia.</title>
         <author></author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908244</link>
         <description><![CDATA[<div>Crespo</div>]]></description>
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         <pubDate>2021-08-04 13:37:38 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908244</guid>
      </item>
      <item>
         <title>Nace “Dolly”, la primera oveja clónica del mundo. 1996</title>
         <author>alan1130aguirre</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908335</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-04 13:37:43 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668908335</guid>
      </item>
      <item>
         <title>360 a.C - Platón idea el término &quot;elementos&quot; por primera vez en su diálogo Timeo.</title>
         <author></author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668912550</link>
         <description><![CDATA[]]></description>
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         <pubDate>2021-08-04 13:41:39 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668912550</guid>
      </item>
      <item>
         <title>Venadio - 1765</title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668915407</link>
         <description><![CDATA[<div>Andrés Manuel del Río Fernández descubre el venadio, segundo elemento descubierto en América.</div>]]></description>
         <enclosure url="http://www.tabelaperiodicacompleta.com/wp-content/uploads/2012/06/vanadio.jpg" />
         <pubDate>2021-08-04 13:44:33 UTC</pubDate>
         <guid>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668915407</guid>
      </item>
      <item>
         <title>1970 - Se comienza a investigar los CFC</title>
         <author>sandovalmafer62</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668920254</link>
         <description><![CDATA[<div>Se comienza a investigar los CFC (cloruro fluoruro carbono) que dañan la capa de ozono.</div>]]></description>
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         <pubDate>2021-08-04 13:48:56 UTC</pubDate>
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      </item>
      <item>
         <title>1828 - Urea </title>
         <author>naomi2018g</author>
         <link>https://padlet.com/alan1130aguirre/c73yhgxoyr3s5c7t/wish/1668921846</link>
         <description><![CDATA[<div>La teoría del vitalismo clasificaba los compuestos químicos en orgánicos e inorgánicos, pero la idea se vino abajo cuando Frederic Wöhler calentó cianato de amonio (compuesto orgánico) y obtuvo urea, compuesto orgánico que se encuentra en la orina de animales y humanos. </div>]]></description>
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         <pubDate>2021-08-04 13:50:30 UTC</pubDate>
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      </item>
      <item>
         <title>1954 - Se prueba la bomba de hidrogeno</title>
         <author>sandovalmafer62</author>
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