Argon: Difference between revisions
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imported>David Yamakuchi mNo edit summary |
imported>Milton Beychok (Added some info and also a references section) |
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|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> | ||
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|properties= | |properties=Colorless, odorless, inert gas. Non-toxic. | ||
|compounds= | |compounds= | ||
|uses= | |uses= | ||
|hazard= | |hazard= | ||
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'''Argon''' | |||
'''Argon''' is a [[Chemical elements|chemical element]], having the [[chemical symbol]] Ar. Its [[atomic number]] (the number of [[proton]]s) is 18. It has a [[Atomic mass#Standard atomic weights of the elements|standard atomic weight]] of 39.948 g•mol<sup> −1</sup>, and is typically found as a [[gas]] in its elemental form. | |||
Argon is considered a member of the "Nobel gas" class of element. At a [[pressure]] of 101.325 k[[Pascal (unit)|Pa]], it has a [[boiling point]] −185.85 °[[Celsius (unit)|C]], and a [[melting point]] of −189.35 °C. It is the third most common gas in the [[Earth's atmosphere]], at 0.934% by volume.<ref>[http://www.srh.noaa.gov/srh/jetstream/atmos/atmos_intro.htm The Atmosphere] From the website of the [[National Oceanic and Atmospheric Administration]] (NOAA) and the [[National Weather Service]] (NWS), Last updated May 5, 2009</ref> | |||
==References== | |||
{{reflist}} | |||
Revision as of 16:49, 18 April 2011
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Argon is a chemical element, having the chemical symbol Ar. Its atomic number (the number of protons) is 18. It has a standard atomic weight of 39.948 g•mol −1, and is typically found as a gas in its elemental form.
Argon is considered a member of the "Nobel gas" class of element. At a pressure of 101.325 kPa, it has a boiling point −185.85 °C, and a melting point of −189.35 °C. It is the third most common gas in the Earth's atmosphere, at 0.934% by volume.[1]
References
- ↑ The Atmosphere From the website of the National Oceanic and Atmospheric Administration (NOAA) and the National Weather Service (NWS), Last updated May 5, 2009