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      <title>Tabela periódica dos elementos by Lucilo Chagas Sousa Campos</title>
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      <language>en-us</language>
      <pubDate>2024-05-19 19:10:28 UTC</pubDate>
      <lastBuildDate>2024-05-20 14:36:13 UTC</lastBuildDate>
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         <title>jogo</title>
         <author>lucilo1096117</author>
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         <pubDate>2024-05-19 19:43:01 UTC</pubDate>
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         <title>1) Indique o número de prótons, nêutrons e elétrons que existem, respectivamente, no átomo de mercúrio:</title>
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         <pubDate>2024-05-19 19:57:57 UTC</pubDate>
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         <title>2) O átomo de um elemento químico possui 83 prótons, 83 elétrons e 126 nêutrons. Qual é, respectivamente, o número atômico e o número de massa desse átomo?</title>
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         <pubDate>2024-05-19 19:59:42 UTC</pubDate>
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         <title>3) Um cátion metálico trivalente tem 76 elétrons e 118 nêutrons. O átomo do elemento químico, do qual se originou, tem número atômico e número de massa, respectivamente:</title>
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         <pubDate>2024-05-19 20:00:46 UTC</pubDate>
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         <title>4) Qual o número de massa (A) de um átomo de cálcio (Z = 20) com 20 nêutrons?</title>
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         <pubDate>2024-05-19 20:02:06 UTC</pubDate>
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         <title>5 )Dada a tabela abaixo sobre os elementos C e D:</title>
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         <description><![CDATA[<p>Quais são os valores de x, y, z, w, v?</p>]]></description>
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         <pubDate>2024-05-19 20:06:03 UTC</pubDate>
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         <title>6)Quantos elétrons de valência existem na configuração do elemento químico de número atômico 52?</title>
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         <pubDate>2024-05-19 20:13:30 UTC</pubDate>
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