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      <title>Radioactivity by </title>
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      <description>Work in pairs - brainstorm activity</description>
      <language>en-us</language>
      <pubDate>2016-12-05 01:21:24 UTC</pubDate>
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         <title>element is radioactive when proton no. is greater than 82 (lead)</title>
         <author>minae_kang99</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646368</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:02:45 UTC</pubDate>
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         <title>half life</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646381</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:02:58 UTC</pubDate>
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      <item>
         <title>Radioactivity</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646382</link>
         <description><![CDATA[<div><strong>alpha decay</strong> - least penetrating, high ionising ability<br>give off an atom consisting of two protons and two neutrons (helium nucleus)<br><strong>beta decay</strong> - medium penetration and ionising ability<br><strong>gamma decay</strong> - high penetration, low ionising ability<br><br><br><br></div>]]></description>
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         <pubDate>2016-12-05 03:02:58 UTC</pubDate>
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         <title></title>
         <author>SamOrchard</author>
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         <pubDate>2016-12-05 03:03:12 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646439</link>
         <description><![CDATA[<div>hydrogen into deuterium<br>atom into isotope<br>half life<br>used as a great energy source<br><br><br></div>]]></description>
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         <pubDate>2016-12-05 03:03:51 UTC</pubDate>
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      <item>
         <title></title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646533</link>
         <description><![CDATA[<div>alpha particles can be stopped by paper, beta by a few sheets of aluminium, gamma by lead </div>]]></description>
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         <pubDate>2016-12-05 03:04:41 UTC</pubDate>
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      <item>
         <title>Beta</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646566</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:05:02 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646566</guid>
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      <item>
         <title>RAYS</title>
         <author>SamOrchard</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646588</link>
         <description><![CDATA[<div>Alpha - nucleus <em>(particle)</em><br>Beta - electron <em>(particle)</em><br>Gamma - photon <em>(wave)</em></div>]]></description>
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         <pubDate>2016-12-05 03:05:19 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646588</guid>
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         <title>Uranium</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646598</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:05:31 UTC</pubDate>
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         <title>Lead is a daughter of Uranium</title>
         <author>SamOrchard</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646754</link>
         <description><![CDATA[<div>Uranium is extremely unstable and it continues to lose protons&nbsp;until it becomes LEAD</div>]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:06:02 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646754</guid>
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         <title>neutron to proton ratio is between 1:1 and 1:1.5  where nuclei is stable</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646788</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:06:39 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646788</guid>
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      <item>
         <title>carbon dating</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646792</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:06:42 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646792</guid>
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         <title>Fukushima</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646793</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:06:47 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141646793</guid>
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         <title>Half Life</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647019</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:08:39 UTC</pubDate>
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      <item>
         <title>radioactivity caused by unstable isotopes (radioisotopes)</title>
         <author>jadetab</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647072</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:09:02 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647072</guid>
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      <item>
         <title>Carcinogenic</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647098</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:09:35 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647098</guid>
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         <title>cobalt - 60 is a radioisotope </title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647113</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:09:46 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647113</guid>
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      <item>
         <title>Radioactive decay </title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647190</link>
         <description><![CDATA[<div>Is the process of by which the nucleus of an unstable atom loses energy by emitting radiation,including alpha particles,beta particles,Gemma rays and conversion electrons.</div>]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:10:59 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647190</guid>
      </item>
      <item>
         <title>radioisotopes</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647214</link>
         <description><![CDATA[<div>Any of several species of the same chemical element with different masses whose nuclei are unstable and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta, and gamma rays.</div>]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:11:19 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647214</guid>
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      <item>
         <title>alpha decay</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647243</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:11:55 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647243</guid>
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         <title>Beta decay</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647434</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:14:58 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647546</link>
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         <pubDate>2016-12-05 03:16:41 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647546</guid>
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         <title>Gamma decay</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647575</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:16:59 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647575</guid>
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      <item>
         <title>Bombs</title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647646</link>
         <description><![CDATA[]]></description>
         <enclosure url="" />
         <pubDate>2016-12-05 03:17:54 UTC</pubDate>
         <guid>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647646</guid>
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      <item>
         <title></title>
         <author>SamOrchard</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647732</link>
         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:19:17 UTC</pubDate>
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         <title></title>
         <author></author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141647898</link>
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         <pubDate>2016-12-05 03:21:50 UTC</pubDate>
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      <item>
         <title></title>
         <author>SamOrchard</author>
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         <pubDate>2016-12-05 03:22:06 UTC</pubDate>
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         <title></title>
         <author>SamOrchard</author>
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         <description><![CDATA[]]></description>
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         <pubDate>2016-12-05 03:22:30 UTC</pubDate>
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      <item>
         <title></title>
         <author>SamOrchard</author>
         <link>https://padlet.com/janet_atchison/gpv1g2dkmc8n/wish/141648024</link>
         <description><![CDATA[<div>Me: Research Ansto<br>Inner Me: Post more memes&nbsp;<br>Me: ...&nbsp;</div>]]></description>
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         <pubDate>2016-12-05 03:24:04 UTC</pubDate>
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