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For the code below, how would I use this information to make an external XML DTD

ID: 3759820 • Letter: F

Question

For the code below, how would I use this information to make an external XML DTD?

<ElementDescription>

    <Element>Symbol="Ag" Name="Silver" AtomicNumber="47" AtomicWeight="107.8682" </Element>

    <Element> Symbol="Cu" Name="Copper" AtomicNumber="29" AtomicWeight="63.546"</Element>

    <Element> Symbol="C" Name="Carbon" AtomicNumber="6" AtomicWeight="12.0107"</Element>

    <Element> Symbol="N" Name="Nitrogen" AtomicNumber="7" AtomicWeight="14.0067"</Element>

    <Element> Symbol="Ca" Name="Calcium" AtomicNumber="20" AtomicWeight="40.078"</Element>

</ElementDescription>

Explanation / Answer

<?xml version="1.0"?>
<!DOCTYPE ElementDescription SYSTEM "ElementDescription.dtd">