Argon: Difference between revisions

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imported>David E. Volk
(remove italics for symbol, use bold or nothing)
imported>David Yamakuchi
mNo edit summary
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|elSym=Ar
|elSym=Ar
|elNum=18
|elNum=18
|elGroup=Noble Gas
|elClass=Noble Gas
|eltrnCfg=1''s''<sup>2</sup>2''s''<sup>2</sup>2''p''<sup>6</sup>3''s''<sup>2</sup>3''p''<sup>6</sup>
|eltrnCfg=1''s''<sup>2</sup>2''s''<sup>2</sup>2''p''<sup>6</sup>3''s''<sup>2</sup>3''p''<sup>6</sup>
|no1=
|no1=

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Argon
39.948(1)



  Ar
18
1s22s22p63s23p6
[ ? ] Noble Gas:
Properties:
Inert

Argon (symbol, Ar) is a chemical element with atomic number 18. It is an inert gas of the eighteenth group of the modern periodic table. It is present in a small quantity in the earth's atmosphere. It owes its non-reactivity mainly to its completely filled outermost shell.