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EncyclopediaPeriodic Table of the Elements: Argon| Atomic Number: | 18 | | Atomic Symbol: | Ar | | | Argon | | Atomic Weight: | 39.948 | Electron
Configuration: | 2 · 8 · 8 | The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved. More on Periodic Table of the Elements Argon from Infoplease:
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