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Argon atomic weight

Argon

Argon

39.948
wikipedia
What is the standard atomic weight (ratio of the average mass of atoms of an element to 1/12 of the mass of an atom of carbon-12) Argon, the chemical element represented by the symbol Ar?
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External web pages (using standard web search):

Atomic Data for Argon (Ar)
Argon (Ar) Atomic Data for Argon (Ar) Atomic Number = 18 Atomic Weight = 39.948 Reference E95
http://physics.nist.gov/PhysRefData/Handbook/Tables/argontable1.htm
Argon - Wikipedia, the free encyclopedia
This was puzzling at the time when argon was discovered, since Mendeleev had placed the elements in his periodic table in order of atomic weight, although the inertness of argon ...
http://en.wikipedia.org/wiki/Argon
ARGON
three stable, argon atomic isotopes, of different weights. ... the heaviest weight argon gas atoms
http://www.atomic-elements.info/argon_data.htm
Argon - Elements Database
Argon definition. Argon atomic number, Argon atomic weight, Argon symbol, define Argon. Explain Argon. What is Argon? Argon FAQ.
http://www.elementsdatabase.com/Argon-Ar-18-element/
Partial Pressure Question? - Yahoo! Answers
A gas mixture consists of equal masses of methane (molecular weight 16.0) and argon (atomic weight 40.0). If the partial pressure of argon is 0.263 atm, what is the ...
http://answers.yahoo.com/question/index?qid=20090309190659AAhQ5oS

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