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argon
(redirected from Element 18)

   Also found in: Encyclopedia, Wikipedia, Hutchinson 0.01 sec.
argon /ar·gon/ (Ar) (ahr´gon) a chemical element, at. no. 18.
ar·gon (ärgn)
n. Symbol Ar
A colorless, inert gaseous element constituting approximately one percent of the earth's atmosphere, used in electric bulbs and fluorescent tubes and in lasers used for opthalmic procedures. Atomic number 18.

Argon
A colorless, odorless gas.
Mentioned in: Laser Surgery

argon (Ar)
[är′gon]
Etymology: Gk, argos, inactive
a colorless, odorless, chemically inactive gas, making up approximately 1% of the atmosphere. Its atomic mass is 39.95; its atomic number is 18. It forms no known compounds.

argon
a chemical element, atomic number 18, atomic weight 39.948, symbol Ar. See Table 6.


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David Freeman, Department of Water and Power general manager, said his agency began testing for the element 18 months ago and discovered it in varying amounts, but well below the state's allowable level of 50 parts per billion.
 
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