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Which is an element? water carbon dioxide air hydrogen?
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Which is an element? water carbon dioxide air hydrogen?

User MsA
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The answer is hydrogen, hoped that helps:)
User Xmojmr
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Water and carbon dioxide are compounds. Air is a mixture. The element that is listed is hydrogen.

Remember that you can also find elements on a periodic table.

Your answer is hydrogen.
User Necreaux
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