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   <channel>
      <title>ATOMO by </title>
      <link>https://padlet.com/andreagreco27/ifhccsxlq8hq</link>
      <description>Realizzato con un rapido sorriso</description>
      <language>en-us</language>
      <pubDate>2017-09-05 15:32:04 UTC</pubDate>
      <lastBuildDate>2017-09-09 14:20:56 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
      <image>
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      <item>
         <title>ATOMO</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184802651</link>
         <description><![CDATA[<div>Compito delle vacanze<br>Di<br>Andrea Greco</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:37:05 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184802651</guid>
      </item>
      <item>
         <title>GIALLO=PUNTO DI PARTENZA</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184803742</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:39:14 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184803742</guid>
      </item>
      <item>
         <title> Cos è un atomo?</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184804959</link>
         <description><![CDATA[<div>L’<strong>atomo</strong> è parte più piccola di un elemento. </div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:41:26 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184804959</guid>
      </item>
      <item>
         <title>ROSA=SPIEGAZIONE</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184806023</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:43:24 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184806023</guid>
      </item>
      <item>
         <title>Com è formato un atomo</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184806374</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:44:06 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184806374</guid>
      </item>
      <item>
         <title>Nucleo</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184807165</link>
         <description><![CDATA[<div>L’atomo ha un nucleo centrale, a sua volta costituito da <em>protoni</em>, ovvero da particelle dotate di carica elettrica positiva, e <em>neutroni</em>, particelle la cui carica elettrica netta è pari a zero</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:45:44 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184807165</guid>
      </item>
      <item>
         <title>VERDE=NOTA BENE</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184807832</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:46:50 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184807832</guid>
      </item>
      <item>
         <title>Oltre al nucleo?</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184809554</link>
         <description><![CDATA[<div>Attorno al nucleo (la cui carica è positiva) ruotano delle particelle con carica elettrica negativa (di pari valore a quella dei protoni) note come <em>elettroni</em>.</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:50:30 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184809554</guid>
      </item>
      <item>
         <title>LEGENDA</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184810843</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:53:25 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184810843</guid>
      </item>
      <item>
         <title>AZZURRO=TAPPE IMPORTANTI</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184812323</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:56:30 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184812323</guid>
      </item>
      <item>
         <title>Numero atomico</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184813151</link>
         <description><![CDATA[<div>il numero di protoni viene detto <em>numero atomico.</em> </div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:58:06 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184813151</guid>
      </item>
      <item>
         <title>Alcuni atomi presentano delle anomalie ?</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184813363</link>
         <description><![CDATA[<div>esistono atomi con il medesimo numero atomico, ma con differente numero di massa (vi è un eccesso oppure una mancanza di neutroni nel nucleo centrale); essi vengono definiti <em>isotopi</em>.</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 15:58:40 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184813363</guid>
      </item>
      <item>
         <title>A</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184814009</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:00:08 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184814009</guid>
      </item>
      <item>
         <title>Regola dell&#39;otteto</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184814329</link>
         <description><![CDATA[<div>Secondo la regola dell’ottetto gli atomi, quando si legano per formare molecole, tendono ad acquistare, perdere o condividere elettroni in modo da avere otto elettroni nel loro livello più esterno.</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:00:52 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184814329</guid>
      </item>
      <item>
         <title>Ci possono essere eccezioni?</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184817167</link>
         <description><![CDATA[<div>Secondo la regola dell’ottetto gli atomi, quando si legano per formare molecole, tendono ad acquistare, perdere o condividere elettroni in modo da avere otto elettroni nel loro livello più esterno.</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:07:39 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184817167</guid>
      </item>
      <item>
         <title>1)Quando sono presenti un numero dispari di elettroni di valenza</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184817974</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:09:50 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184817974</guid>
      </item>
      <item>
         <title>2)Quando gli elettroni di valenza sono pochi</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184819248</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:12:51 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184819248</guid>
      </item>
      <item>
         <title>3)Quando gli elettroni di valenza sono troppi</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184819509</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:13:26 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184819509</guid>
      </item>
      <item>
         <title>VIOLA=ESEMPIO</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184820644</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:16:20 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184820644</guid>
      </item>
      <item>
         <title>Esempio</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184824355</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 16:25:16 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184824355</guid>
      </item>
      <item>
         <title></title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184824587</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://www.chimica-online.it/download/immagini_download/legame_covalente_singolo.jpg" />
         <pubDate>2017-09-05 16:25:49 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184824587</guid>
      </item>
      <item>
         <title></title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184846319</link>
         <description><![CDATA[]]></description>
         <enclosure url="http://www.chimica-online.it/download/immagini_download/legame_clorurodisodio.jpg" />
         <pubDate>2017-09-05 17:12:01 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184846319</guid>
      </item>
      <item>
         <title>Legame ionico</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184851120</link>
         <description><![CDATA[<div>Il legame ionico si forma tra atomi che hanno basso potenziale di ionizzazione ed atomi che hanno alta affinità elettronica cioè che danno facilmente rispettivamente ioni positivi o cationi e ioni negativi o anioni.</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 17:21:32 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184851120</guid>
      </item>
      <item>
         <title>Legame covalente puro</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184853178</link>
         <description><![CDATA[<div>Il legame covalente si forma quando la configurazione stabile dell’ottetto si raggiunge attraverso la compartecipazione tra atomi di due o più elettroni.nel legame covalente puro gli elettroni sono divisi equamente</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-05 17:26:05 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184853178</guid>
      </item>
      <item>
         <title></title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184855147</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://www.google.it/url?sa=i&amp;rct=j&amp;q=&amp;esrc=s&amp;source=images&amp;cd=&amp;ved=0ahUKEwjB_LH9yI7WAhULuRQKHVMzDOwQjRwIBw&amp;url=http%3A%2F%2Fwww.chimica-online.it%2Fdownload%2Flegame_covalente.htm&amp;psig=AFQjCNGF_tsQwXHbRBXMU4Gw5P1PeC1ORQ&amp;ust=1504718910932021" />
         <pubDate>2017-09-05 17:29:03 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/184855147</guid>
      </item>
      <item>
         <title>legame covalente polare</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185060773</link>
         <description><![CDATA[<div>Nel caso del legame covalente polare L'atomo più elettronegativo tenderà ad attrarre più dell'altro gli elettroni di legame e quindi la nuvola elettronica sarà più grande vicino a quest'atomo e più piccola nell'altro. In questo modo un atomo acquisterà una debole carica negativa e l'altro una debole carica positiva, da qui il nome polare</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-06 11:08:35 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185060773</guid>
      </item>
      <item>
         <title>a</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061180</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-06 11:11:24 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061180</guid>
      </item>
      <item>
         <title>esempio</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061245</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-06 11:11:40 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061245</guid>
      </item>
      <item>
         <title></title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061755</link>
         <description><![CDATA[]]></description>
         <enclosure url="https://www.google.it/imgres?imgurl=https%3A%2F%2Fimage.slidesharecdn.com%2Flegami-130909111317-%2F95%2Flegami-13-638.jpg%3Fcb%3D1378725282&amp;imgrefurl=https%3A%2F%2Fwww.slideshare.net%2Falescatta%2Flegami&amp;docid=ivv6DeLKPX6uQM&amp;tbnid=omtzMEhfutwi2M%3A&amp;vet=10ahUKEwj0-L_utpDWAhVCvRoKHWo2Da8QMwhXKBcwFw..i&amp;w=638&amp;h=360&amp;bih=974&amp;biw=1920&amp;q=legame%20covalente%20polare&amp;ved=0ahUKEwj0-L_utpDWAhVCvRoKHWo2Da8QMwhXKBcwFw&amp;iact=mrc&amp;uact=8" />
         <pubDate>2017-09-06 11:15:16 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061755</guid>
      </item>
      <item>
         <title>esempio</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061854</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2017-09-06 11:15:55 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185061854</guid>
      </item>
      <item>
         <title>legame a idrogeno</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185852742</link>
         <description><![CDATA[<div>Il legame a idrogeno o ponte idrogeno si forma quando nelle molecole é presente un atomo di idrogeno coinvolto in un legame covalente (non l ho capito bene)</div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-08 13:23:22 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/185852742</guid>
      </item>
      <item>
         <title>TAVOLA PERIODICA</title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/186082041</link>
         <description><![CDATA[<div> il chimico Russo <strong>Dimitrij Mendeleev</strong>, compilò una tabella in cui erano ordinati tutti gli elementi conosciuti in base al loro numero atomico. Questa tabella, detta tavola periodica degli elementi è usata ancora oggi per identificare le proprietà dei diversi atomi. Gli elementi sono disposti in ordine di numero atomico crescente   in righe orizzontali chiamate <strong>periodi.<br>I colori </strong>della tavola periodica permettono di distinguere i gruppi più importanti in qui possiamo dividere gli elementi: <strong>metalli  non metalli semimetalli elementi artificiali</strong> e <strong>gas nobili</strong></div>]]></description>
         <enclosure url="" />
         <pubDate>2017-09-09 13:33:50 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/186082041</guid>
      </item>
      <item>
         <title></title>
         <author>andreagreco27</author>
         <link>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/186084715</link>
         <description><![CDATA[]]></description>
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         <pubDate>2017-09-09 14:19:58 UTC</pubDate>
         <guid>https://padlet.com/andreagreco27/ifhccsxlq8hq/wish/186084715</guid>
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