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      <title>tavola periodica by Massimo Dellavalle</title>
      <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k</link>
      <description>Realizzato con forza d&#39;animo</description>
      <language>en-us</language>
      <pubDate>2019-02-16 10:15:48 UTC</pubDate>
      <lastBuildDate>2024-11-21 15:39:02 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>Non Metalli</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331981898</link>
         <description><![CDATA[<div>La classe dei non metalli è composta da idrogeno, carbonio, azoto, ossigeno, fosforo, zolfo e selenio.</div>]]></description>
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         <pubDate>2019-02-16 10:34:19 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331981898</guid>
      </item>
      <item>
         <title>Metalli Alcalino Terrosi</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982032</link>
         <description><![CDATA[]]></description>
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         <pubDate>2019-02-16 10:36:08 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982032</guid>
      </item>
      <item>
         <title>Gruppi</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982143</link>
         <description><![CDATA[<div>Gessaroli: Gas nobili<br>Lepore R.: Non metalli<br>Gentili: Alcalino-terrosi<br>Benvenuti: Terre rare<br>Agosta: Attinidi<br><br></div>]]></description>
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         <pubDate>2019-02-16 10:37:39 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982143</guid>
      </item>
      <item>
         <title>Carbonio</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982448</link>
         <description><![CDATA[<div><br>Il carbonio allo stato elementare è conosciuto fin dalla preistoria sotto forma di grafite e carbone, prodotto dalle popolazioni antiche bruciando materiale organico con poco ossigeno.<br>Il carbonio può organizzarsi in strutture resistenti e leggere, così viene utilizzato nella produzione di punte perforanti, articoli sportivi e decorativi.</div>]]></description>
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         <pubDate>2019-02-16 10:42:14 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982448</guid>
      </item>
      <item>
         <title>Attinoidi/Attinidi</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982459</link>
         <description><![CDATA[<div>Attinio<br>Torio<br>Protoattinio<br>Uranio<br>Nettunio<br>Plutonio<br>Americio<br>Curio<br>Berkelio<br>Californio<br>Einsteinio<br>Fermio<br>Mendelevio<br>Nobelio<br>Laurenzio</div>]]></description>
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         <pubDate>2019-02-16 10:42:32 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331982459</guid>
      </item>
      <item>
         <title>TERRE RARE</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983145</link>
         <description><![CDATA[<div>Vengono chiamate terre rare perché raccolti in minerali poco frequenti in natura in concentrazioni elevate nella crosta terrestre </div>]]></description>
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         <pubDate>2019-02-16 10:50:55 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983145</guid>
      </item>
      <item>
         <title>L&#39;attinio Ac</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983147</link>
         <description><![CDATA[<div>L'attinio è un metallo radioattivo dall'aspetto argenteo, la sua radioattività lo porta ad emettere una luce bluastra al buio.<br>Nonostante l'intensa attività radioattiva non ha alcun uso di tipo industriale, apparte un suo isotopo Ac225 che viene usato in medicina nucleare.</div>]]></description>
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         <pubDate>2019-02-16 10:50:56 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983147</guid>
      </item>
      <item>
         <title>Torio Th</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983525</link>
         <description><![CDATA[<div>Il torio è un metallo debolmente radioattivo.<br>E' molto presente nel suolo terrestre infatti è circa 3/4 volte la quantità di uranio.</div>]]></description>
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         <pubDate>2019-02-16 10:55:33 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983525</guid>
      </item>
      <item>
         <title>Zolfo</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983620</link>
         <description><![CDATA[<div>Anche lo zolfo era noto nell'antichità, dove veniva usato come medicinale e insetticida. Successivamente, in epoca classica, venne utilizzato per produrre i primi fuochi d'artificio.<br>Al giorno d'oggi viene impiegato a livello industriale per medicinali e fibre sintetiche</div>]]></description>
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         <pubDate>2019-02-16 10:57:03 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983620</guid>
      </item>
      <item>
         <title>GAS  NOBILI</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983625</link>
         <description><![CDATA[]]></description>
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         <pubDate>2019-02-16 10:57:05 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983625</guid>
      </item>
      <item>
         <title>SCANDIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983750</link>
         <description><![CDATA[<div>L'isotopo radioattivo dello scandio viene utilizzato nelle raffinerie di petrolio come tracciante radioattivo. Con le leghe di alluminio e scandio vengono creati attrezzi sportivi e alcuni elementi strutturali dell'industria aerospaziale ad alte prestazioni </div>]]></description>
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         <pubDate>2019-02-16 10:58:44 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331983750</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331984174</link>
         <description><![CDATA[]]></description>
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         <pubDate>2019-02-16 11:02:50 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/331984174</guid>
      </item>
      <item>
         <title>ITTRIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334069124</link>
         <description><![CDATA[<div>L'ossido di ittrio un tempo era usato per generare il colore rosso nei tubi catodici dei televisori ed è usato per produrre granati di ittrio e ferro efficaci filtri di microonde si può utilizzare in formulazioni di ceramiche e vetri speciali </div>]]></description>
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         <pubDate>2019-02-22 10:19:06 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334069124</guid>
      </item>
      <item>
         <title>Protoattinio Pa</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334069831</link>
         <description><![CDATA[<div>Il protoattinio è un metallo denso di colore argenteo.<br>Esso reagisce facilmente con acqua, ossigeno ed acidi inorganici.<br>Non ha utilizzi se non per la ricerca scientifica per colpa della sua tossicità.</div>]]></description>
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         <pubDate>2019-02-22 10:22:54 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334069831</guid>
      </item>
      <item>
         <title>Uranio U</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070418</link>
         <description><![CDATA[<div>L'uranio è un metallo bianco-argenteo, altamente tossico e radioattivo.<br>Nonostante sia rinomato per il suo utilizzo per la produzione di energia, l'uranio viene utilizzato come colorante per vetrate, catalizzatore e come zavorra in imbarcazioni e veivoli.<br>Inoltre con l'uranio impoverito vengono prodotti proiettili usati in ambito militare oltre alla produzione di ordigni nucleari</div>]]></description>
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         <pubDate>2019-02-22 10:26:16 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070418</guid>
      </item>
      <item>
         <title>Fosforo</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070624</link>
         <description><![CDATA[<div>La sua scoperta risale al 1669 ad opera di Brand, un mercante tedesco. La sua particolarità consiste nel bruciare a contatto con l'aria. Per questo viene utilizzato nella produzione di esplosivi, fuochi d'artificio, fiammiferi e oggetti che si illuminano al buio.</div>]]></description>
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         <pubDate>2019-02-22 10:27:33 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070624</guid>
      </item>
      <item>
         <title>LANTANIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070682</link>
         <description><![CDATA[<div>Usato per l'illuminazione a carboni nell'industria cinematografica il suo ossido migliora la resistenza del vetro sono catalizzatori per il cracking del petrolio </div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953022/5a67da6b4550b2349090113bbdd5aa5c/Lantanio.png" />
         <pubDate>2019-02-22 10:27:54 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334070682</guid>
      </item>
      <item>
         <title>CERIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334071148</link>
         <description><![CDATA[<div>Utilizzato nelle leghe dell'acciaio (inossidabile) e nelle leghe dei magneti permanenti e nelle lampadine ad arco voltaico (industria del cinema) usato anche per produrre smalti </div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953022/49e0bbce12531e23a0015632d59afa49/Cerio.png" />
         <pubDate>2019-02-22 10:30:53 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334071148</guid>
      </item>
      <item>
         <title>PRASEODIMIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334072725</link>
         <description><![CDATA[<div>Usato per creare leghe ad alte resistenze nei motori d'aereo forma il nucleo delle luci ad arco nell'industria del cinema conferisce al vetro e agli smalti il colore verde</div>]]></description>
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         <pubDate>2019-02-22 10:39:32 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334072725</guid>
      </item>
      <item>
         <title>UTILIZZO DELLELIO</title>
         <author>abertozzi11202</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073068</link>
         <description><![CDATA[<div>Grazie alla sua scarsa reattività chimica l'elio è stato usato come gas inerte durante la saldatura di alcuni metalli, nei propulsori dei razzi e per gonfiare i palloncini, essendo più leggero dell'aria. <br>Viene anche utilizzato come liquido refrigerante, perché allo stato liquido può avvicinarsi allo zero assoluto.</div>]]></description>
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         <pubDate>2019-02-22 10:41:16 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073068</guid>
      </item>
      <item>
         <title>NEODIMIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073371</link>
         <description><![CDATA[<div>utilizzato per la colorazione degli occhiali per gli schermi dei saldatori, utilizzato negli auricolari e come coloranti per smalti</div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953022/4e8d1df0dc38e2bc36127eeaf0aa527d/Neodimio.png" />
         <pubDate>2019-02-22 10:43:04 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073371</guid>
      </item>
      <item>
         <title>PROMEZIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073917</link>
         <description><![CDATA[<div>Fonte di radiazioni beta per misure di spessore, utilizzato nelle batterie nucleari, in futuro potrebbe essere utilizzato per fonti portatili di raggi X</div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953022/8bf431e12d99379d6c5e28ab7274c810/Promezio.png" />
         <pubDate>2019-02-22 10:45:49 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334073917</guid>
      </item>
      <item>
         <title>Azoto</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334074639</link>
         <description><![CDATA[<div>. L'azoto liquido è utilizzato per il congelamento di alimenti e, in forma gassosa, per la sintesi dell'ammoniaca.</div>]]></description>
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         <pubDate>2019-02-22 10:48:58 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334074639</guid>
      </item>
      <item>
         <title>Nettunio Np</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334074772</link>
         <description><![CDATA[<div>Il Nettunio è un metallo argenteo discretamente radioattivo.<br>Viene utilizzato per produrre energia, in ambito  medico e come rilevatore di fumo(?).</div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953686/dc8846d21caa89bb91bbca0a3179420b/nettunio.jpg" />
         <pubDate>2019-02-22 10:49:41 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334074772</guid>
      </item>
      <item>
         <title>UTILIZZO DEL NEON</title>
         <author>abertozzi11202</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075523</link>
         <description><![CDATA[<div> Essendo inerte, non ci sono molti usi per il neon. L'area in cui trova più impiego è quello delle luci al neon. Quando una scarica elettrica passa attraverso un tubo di vetro pieno di neon, il gas emette una luce rossa intensa. </div><div>|| neon è utilizzato anche come mezzo attivo per alcuni laser. </div>]]></description>
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         <pubDate>2019-02-22 10:53:34 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075523</guid>
      </item>
      <item>
         <title>Ossigeno</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075657</link>
         <description><![CDATA[<div>L'ossigeno è indispensabile per lo sviluppo della vita, isolato per la prima volta dallo svedese Scheele e dall'inglese Priestley.<br>A livello industriale è utilizzato nel processo di produzione dell'acciaio. </div>]]></description>
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         <pubDate>2019-02-22 10:54:11 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075657</guid>
      </item>
      <item>
         <title>SAMARIO</title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075745</link>
         <description><![CDATA[<div>usato come assorbitore di neutroni nei reattori nucleari, l'ossido di samario è usato per produrre vetri capaci di assorbire la luce infrarossa </div>]]></description>
         <enclosure url="https://padlet-uploads.storage.googleapis.com/358953022/b52683d851db830160f18ff9656b0942/Samario.png" />
         <pubDate>2019-02-22 10:54:36 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334075745</guid>
      </item>
      <item>
         <title>UTILIZZO DELL&#39;ARGON</title>
         <author>abertozzi11202</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334076198</link>
         <description><![CDATA[]]></description>
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         <pubDate>2019-02-22 10:56:37 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334076198</guid>
      </item>
      <item>
         <title>Idrogeno</title>
         <author>rlepore11380</author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334077367</link>
         <description><![CDATA[]]></description>
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         <pubDate>2019-02-22 11:02:42 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334077367</guid>
      </item>
      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334077815</link>
         <description><![CDATA[<div>Alcalino Terrosi<br><br></div>]]></description>
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         <pubDate>2019-02-22 11:05:22 UTC</pubDate>
         <guid>https://padlet.com/prof_dellavalle/22cmt2kivn6k/wish/334077815</guid>
      </item>
      <item>
         <title>SEMICONDUTTORI</title>
         <author>prof_dellavalle</author>
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