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  <title>e-sygoing.link — Helium</title>
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    <title>ChemicalElements.com: Helium</title>
    <link>https://e-sygoing.link/link/5305838-chemicalelementscom-helium</link>
    <description>Basic information, atomic structure, and table of isotopes.</description>
    <pubDate>Tue, 04 Feb 2025 16:58:41 -0500</pubDate>
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    <title>Helium</title>
    <link>https://e-sygoing.link/link/5305841-helium</link>
    <description>Data tables and historic information.</description>
    <pubDate>Fri, 13 Dec 2024 04:54:01 -0500</pubDate>
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    <title>EnvironmentalChemistry.com: Helium</title>
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    <description>Atomic structure, chemical and physical properties, and table of nuclides.</description>
    <pubDate>Sat, 07 Dec 2024 16:21:15 -0500</pubDate>
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    <title>Corrosionsource.com: Helium</title>
    <link>https://e-sygoing.link/link/5305842-corrosionsourcecom-helium</link>
    <description>History, sources, properties, isotopes, and uses.</description>
    <pubDate>Thu, 14 Nov 2024 20:42:28 -0500</pubDate>
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    <title>Wikipedia: Helium</title>
    <link>https://e-sygoing.link/link/5305846-wikipedia-helium</link>
    <description>Properties of the element, including its history, applications, and characteristics.</description>
    <pubDate>Tue, 07 May 2024 05:24:48 -0400</pubDate>
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    <title>Lenntech: Helium</title>
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    <description>Physical data, chemical properties, and health effects.</description>
    <pubDate>Tue, 26 Mar 2024 12:46:25 -0400</pubDate>
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