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One of the elements of Earth's periodic table. It has atomic number 18, and is a noble gas. It has the symbol/abbreviation Ar. In normal conditions, it is an invisible gas, but if electricity is passed through it, it will glow pinkish-purple.

A vial of glowing argon.

See also: List of elements

100x100px This article is part of Project Elements, a All Birds project that aims to write comprehensive articles on each element.