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      <title>1-4의 주기율표 by 배승운</title>
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      <language>en-us</language>
      <pubDate>2025-03-30 23:49:58 UTC</pubDate>
      <lastBuildDate>2026-04-09 01:40:27 UTC</lastBuildDate>
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      <item>
         <title>H</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388612943</link>
         <description><![CDATA[<p>1번</p><p>특징-가장 가벼운 원소</p><p>쓰임새-연로 전지 차량, 버스,트럭,선박</p><p>화합물-물(H₂O)</p>]]></description>
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         <pubDate>2025-03-31 03:42:46 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388612943</guid>
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      <item>
         <title>Ca</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388637396</link>
         <description><![CDATA[<p>20번</p><p>특징-은백색의 무른 금속원소</p><p>쓰임새-제설제, 뼈와 치아, 달걀껍질</p><p>화합물- CaCO3, 염화칼슘, 탄산칼슘</p>]]></description>
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         <pubDate>2025-03-31 04:08:57 UTC</pubDate>
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      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388638579</link>
         <description><![CDATA[<p>x</p><p><br/></p><p><br/></p><p><br/></p>]]></description>
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         <pubDate>2025-03-31 04:10:18 UTC</pubDate>
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      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388638676</link>
         <description><![CDATA[<p>x</p><p><br></p><p><br></p><p><br></p>]]></description>
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         <pubDate>2025-03-31 04:10:28 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388638676</guid>
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      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388638970</link>
         <description><![CDATA[<p>x</p><p><br/></p><p><br/></p><p><br/></p>]]></description>
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         <pubDate>2025-03-31 04:10:47 UTC</pubDate>
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      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639035</link>
         <description><![CDATA[<p>x</p><p><br/></p><p><br/></p><p><br/></p>]]></description>
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         <pubDate>2025-03-31 04:10:54 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639035</guid>
      </item>
      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639094</link>
         <description><![CDATA[<p>x</p><p><br></p><p><br></p><p><br></p>]]></description>
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         <pubDate>2025-03-31 04:10:59 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639094</guid>
      </item>
      <item>
         <title>x</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639241</link>
         <description><![CDATA[<p>x</p><p><br/></p><p><br/></p><p><br/></p>]]></description>
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         <pubDate>2025-03-31 04:11:11 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639241</guid>
      </item>
      <item>
         <title>He</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639653</link>
         <description><![CDATA[<p>2번</p><p>특징- 공기보다 가볍고 인체에 무해하다</p><p>쓰임새- 풍선, 기구, 비행선</p><p>화합물- 없음</p>]]></description>
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         <pubDate>2025-03-31 04:11:43 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639653</guid>
      </item>
      <item>
         <title>Li</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639915</link>
         <description><![CDATA[<p>3번</p><p>특징- 무르고 은백색이며 부식을 유발</p><p>쓰임새- 전자기기, 의료기기, 저장장치</p><p>화합물- LiHe, LiOH, Li2CO3</p>]]></description>
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         <pubDate>2025-03-31 04:12:03 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388639915</guid>
      </item>
      <item>
         <title>Be</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388640567</link>
         <description><![CDATA[<p>4번</p><p>특징-매우 가벼운 금속, 회색빛이 난다</p><p>쓰임새-항공우주, 원자력 등</p><p>화합물-수산화베릴륨, 황산베릴륨</p>]]></description>
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         <pubDate>2025-03-31 04:12:51 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388640567</guid>
      </item>
      <item>
         <title>B</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388640741</link>
         <description><![CDATA[<p>5번</p><p>특징-흑회색에 준금속</p><p>쓰임새-비료,약품,향균</p><p>화합물-산화붕소,탄화붕소 등</p>]]></description>
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         <pubDate>2025-03-31 04:13:04 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388640741</guid>
      </item>
      <item>
         <title>C</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641009</link>
         <description><![CDATA[<p>6번</p><p>특징- 다양한 결합을 할수있다</p><p>쓰임새- 연료로 많이 사용된다</p><p>화합물- 이산화탄소 포도당</p>]]></description>
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         <pubDate>2025-03-31 04:13:23 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641009</guid>
      </item>
      <item>
         <title>N</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641113</link>
         <description><![CDATA[<p>7번</p><p>특징- 지구 대기 중 약 78%를 차지함</p><p>쓰임새- 액체 산화물 제조, 플라스틱 </p><p>화합물- 암모니아, 질산, 하이드라진</p>]]></description>
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         <pubDate>2025-03-31 04:13:31 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641113</guid>
      </item>
      <item>
         <title>O</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641213</link>
         <description><![CDATA[<p>8번</p><p>특징- 물에 잘 녹지 않는 특징을 가진다.</p><p><strong>쓰임새- 호흡,의료,광합성</strong></p><p><strong>화합물- 이산화 탄소,물,오존</strong></p>]]></description>
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         <pubDate>2025-03-31 04:13:40 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641213</guid>
      </item>
      <item>
         <title>F</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641576</link>
         <description><![CDATA[<p>9번</p><p>특징- 모든 원소 중에서 전기음성도 큼</p><p>쓰임새- 치약,코팅제,세정제</p><p>화합물- 폴리테트라플루오로렌틸렌</p>]]></description>
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         <pubDate>2025-03-31 04:14:08 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641576</guid>
      </item>
      <item>
         <title>Ne</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641692</link>
         <description><![CDATA[<p>10번</p><p>특징-반짝반짝 빛난다</p><p>쓰임새-네온사인,조명</p><p>화합물-없다</p>]]></description>
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         <pubDate>2025-03-31 04:14:18 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388641692</guid>
      </item>
      <item>
         <title>Na</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642061</link>
         <description><![CDATA[<p>11번</p><p>특징-칼로 잘리는 부드러운 은백색 금속</p><p>쓰임새-음식의 맛을 내고 보존함</p><p>화합물-염화나트륨(NaCl)</p>]]></description>
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         <pubDate>2025-03-31 04:14:42 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642061</guid>
      </item>
      <item>
         <title>Mg</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642183</link>
         <description><![CDATA[<p>12번</p><p>특징-은백색 가벼운 금속</p><p>쓰임새-합금 재료, 체내 필수 영양소</p><p>화합물-산화마그네슘, 수산화마그네슘</p>]]></description>
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         <pubDate>2025-03-31 04:14:53 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642183</guid>
      </item>
      <item>
         <title>Al</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642361</link>
         <description><![CDATA[<p>13번</p><p>특징- 은백색의 부드러운 금속</p><p>쓰임새- 녹이 잘 슬지 않아 알루미늄 캔으로 많이 쓰임</p><p>화합물- 알라네이트</p>]]></description>
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         <pubDate>2025-03-31 04:15:06 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642361</guid>
      </item>
      <item>
         <title>Si</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642659</link>
         <description><![CDATA[<p>14번</p><p>특징-청회색을 가진 단단하고 잘 부서짐</p><p>쓰임새-조형물,윤활유,광택제</p><p>화합물-산화규소,탄화규소</p>]]></description>
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         <pubDate>2025-03-31 04:15:30 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642659</guid>
      </item>
      <item>
         <title>P</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642821</link>
         <description><![CDATA[<p>15번</p><p>특징-백린·적린 형태로 존재</p><p>쓰임새-<strong>비료, 성냥, 살충제, 세제</strong></p><p><strong>화합물-</strong>백린과 적린, 자린, 흑린</p>]]></description>
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         <pubDate>2025-03-31 04:15:39 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642821</guid>
      </item>
      <item>
         <title>S</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642933</link>
         <description><![CDATA[<p>16번</p><p>특징- 물에 잘 녹지 ×, 전기가 통하지 ×</p><p>쓰임새- 머리카락, 손톱, 피부의 성분</p><p>화합물- 황산, 이산화황 등</p>]]></description>
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         <pubDate>2025-03-31 04:15:48 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388642933</guid>
      </item>
      <item>
         <title>Cl</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388643036</link>
         <description><![CDATA[<p>17번</p><p>특징-강한 독성 황록색, 반응성 매우 큼</p><p>쓰임새-살균 및 소독</p><p>화합물-&nbsp;차아염소산나트륨</p>]]></description>
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         <pubDate>2025-03-31 04:15:58 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388643036</guid>
      </item>
      <item>
         <title>Ar</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388643374</link>
         <description><![CDATA[<p>18번</p><p>특징-최초로 발견된 비활성기체</p><p>쓰임새-미사일에 종종 쓰인다</p><p>화합물-화합물을 거의 형성하지않음</p>]]></description>
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         <pubDate>2025-03-31 04:16:06 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388643374</guid>
      </item>
      <item>
         <title>K</title>
         <author>berrard1</author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388686483</link>
         <description><![CDATA[<p>19번</p><p>특징-</p><p>쓰임새-</p><p>화합물-</p>]]></description>
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         <pubDate>2025-03-31 04:58:00 UTC</pubDate>
         <guid>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3388686483</guid>
      </item>
      <item>
         <title>.질소</title>
         <author></author>
         <link>https://padlet.com/berrard1/g5kcxrvzouabhqmo/wish/3857270994</link>
         <description><![CDATA[]]></description>
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         <pubDate>2026-04-08 03:37:49 UTC</pubDate>
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