Periodic Table of the Elements: Argon

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Periodic Table of the Elements: Argon
Atomic Number:18
Atomic Symbol:Ar
 Argonargon
[Gr.,=inert], gaseous chemical element; symbol Ar; at. no. 18; at. wt. 39.948; m.p. −189.2°C;; b.p. −185.7°C;; density 1.784 grams per liter at STP; valence 0. Argon is a colorless, odorless, tasteless gas occurring in air (of which it constitutes 0.
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Atomic Weight:39.948
Electron Configuration:2 · 8 · 8
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