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      <pubDate>2016-01-19 10:30:23 UTC</pubDate>
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         <enclosure url="https://fr.wikipedia.org/wiki/Quark" />
         <pubDate>2016-01-19 10:49:36 UTC</pubDate>
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         <pubDate>2016-01-19 10:52:09 UTC</pubDate>
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         <pubDate>2016-01-19 10:53:56 UTC</pubDate>
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         <pubDate>2016-01-19 10:55:39 UTC</pubDate>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/89939593</link>
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         <pubDate>2016-01-19 10:56:38 UTC</pubDate>
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         <pubDate>2016-01-19 18:06:34 UTC</pubDate>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/90471495</link>
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         <pubDate>2016-01-21 14:33:39 UTC</pubDate>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/90472476</link>
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         <pubDate>2016-01-21 14:36:14 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92538329</link>
         <description><![CDATA[<div>&nbsp;Le mot&nbsp;<strong>atome</strong>&nbsp;vient du grec&nbsp;<em>atomos</em>&nbsp;qui signifie indivisible, insécable. Il convenait donc parfaitement au concept d'atome lorsqu'il a été élaboré par les chimistes au début du XIXème siècle, c'est à dire comme&nbsp;<strong>la plus petite partie d'un corps pur</strong>.<br><br></div><div>&nbsp;Maintenant, on sait que les atomes ne sont pas indivisibles, qu'on peut en arracher des électrons, fissionner leur noyau, etc... Mais le nom est resté !<br><br><br></div>]]></description>
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         <pubDate>2016-02-02 10:45:35 UTC</pubDate>
         <guid>https://padlet.com/gabriel_hitier89/APsciences/wish/92538329</guid>
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         <title></title>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92538846</link>
         <description><![CDATA[<div>Un atome contient un&nbsp;<a href="http://voyage.in2p3.fr/noyau.html"><strong>noyau</strong></a>&nbsp;situé en son centre et des&nbsp;<a href="http://voyage.in2p3.fr/lexique.html#electron"><strong>électrons</strong></a>&nbsp;qui "tournent autour" du noyau.</div><div>&nbsp;Le noyau contient des&nbsp;<a href="http://voyage.in2p3.fr/lexique.html#nucleon"><strong>nucléons</strong></a>, c'est à dire des&nbsp;<a href="http://voyage.in2p3.fr/lexique.html#proton"><strong>protons</strong></a>&nbsp;et des&nbsp;<a href="http://voyage.in2p3.fr/lexique.html#neutron"><strong>neutrons</strong></a>.<br><br></div>]]></description>
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         <pubDate>2016-02-02 10:49:18 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92539007</link>
         <description><![CDATA[<div><figure data-trix-content-type="image" data-trix-attachment="{&quot;contentType&quot;:&quot;image&quot;,&quot;height&quot;:300,&quot;url&quot;:&quot;http://voyage.in2p3.fr/atome.jpg&quot;,&quot;width&quot;:300}" class="attachment attachment-preview"><img src="http://voyage.in2p3.fr/atome.jpg" height="300" width="300"><figcaption class="caption"></figcaption></figure></div>]]></description>
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         <pubDate>2016-02-02 10:49:50 UTC</pubDate>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92539158</link>
         <description><![CDATA[<div>Il y a exactement le&nbsp;<strong>même nombre</strong>&nbsp;d'électrons et de protons dans un atome, un atome est donc&nbsp;<strong>électriquement neutre</strong>. Le nombre d'électrons (ou de protons) dans un atome détermine ses propriétés physiques et chimiques, c'est le&nbsp;<strong>nombre atomique</strong>.</div>]]></description>
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         <pubDate>2016-02-02 10:50:49 UTC</pubDate>
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         <title></title>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92539464</link>
         <description><![CDATA[<div><strong>Les&nbsp; quarks, ce sont les grains qui vont par trois et qui forment neutrons,&nbsp; protons&nbsp; et d'autres particules…</strong></div><div><strong>&nbsp;</strong></div><div><strong>Leur&nbsp; taille: 10-20&nbsp; m ou même, selon la théorie des cordes: 10-35&nbsp; m</strong></div>]]></description>
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         <pubDate>2016-02-02 10:52:26 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92539578</link>
         <description><![CDATA[<div>ATOME</div>]]></description>
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         <pubDate>2016-02-02 10:52:59 UTC</pubDate>
         <guid>https://padlet.com/gabriel_hitier89/APsciences/wish/92539578</guid>
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      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92539618</link>
         <description><![CDATA[<div>QUARK</div>]]></description>
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         <pubDate>2016-02-02 10:53:12 UTC</pubDate>
         <guid>https://padlet.com/gabriel_hitier89/APsciences/wish/92539618</guid>
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         <title></title>
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         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/92540199</link>
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         <pubDate>2016-02-02 10:56:43 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/gabriel_hitier89/APsciences/wish/94000100</link>
         <description><![CDATA[<div>http://molaire1.perso.sfr.fr/histoire.html<br>http://voyage.in2p3.fr/atome.html#histo<br><br></div>]]></description>
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         <pubDate>2016-02-09 10:26:20 UTC</pubDate>
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