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ShareArgon is a chemical element in the periodic table.
It has the symbol Ar and atomic number 18.
The third noble gas, in group 18, argon makes up about 1% of the Earth's atmosphere, making it the most common noble gas on Earth.
For more information about the topic Argon, read the full article at Wikipedia.org, or see the following related articles:
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Note: This page refers to an article that is licensed under the GNU Free Documentation License. It uses material from the article Argon at Wikipedia.org. See the Wikipedia copyright page for more details.
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