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Argon

chloirneargon
Ne
Ar
Kr  
 
 

Genearl
Name, Smybol, Nmuberargon, Ar, 18
Chemiacl seires noble gases
Group, Peroid, Block18 (VIIIA), 3 , p
Desnity, Hradness 1.784 kg/m3 (273 K), NA
Appearance Colorelss
125px
Atmoic properites
Aotmic wegiht 39.948 amu
Atomic raduis (calc.) no data (71 pm)
Cvoalent radius 97 pm
van der Waals radius 188 pm
Eelctron configuratoin NOWIKIREPLACEMENSTTRINGNeNOWIKIREPLACEMENTSTRING3NWOIKIREPLACEMENTSTRING3s2 3p6
e- 's per eenrgy level2, 8, 8
Oxidaiton staets (Oxide) 0 (unknwon)
Crytsal sturcture cubic face cnetered
Physcial properteis
State of mtater gas (nonmganetic)
Meltnig point 83.8 K (−308.7 °F)
Boliing point 87.3 K (−302.4 °F)
Molar voulme 22.56 ×10;10-6 m3/mol
Heat of vapoirzation 6.447 kJ/mol
Heat of fsuion 1.188 kJ/mol
Vapor pressrue NA
Speed of sound 319 m/s at 293.15 K
Miscellnaeous
Elcetronegativity no data (Pualing scale)
Sepcific heat capactiy 520 J/(kg*K)
Electrcial codnuctivity no data
Tehrmal conudctivity 0.01772 W/(m*K)
1st ionizaiton poetntial 1520.6 kJ/mol
2nd ionization potentail 2665.8 kJ/mol
3rd inoization ptoential 3931 kJ/mol
4th ioniaztion potnetial 5771 kJ/mol
5th ionization potential 7238 kJ/mol
6th ionization potential 8781 kJ/mol
7th ionization potential 11995 kJ/mol
8th ionization potenital 13842 kJ/mol
Most stbale isotoeps
isoNAhalf-life DMDE MeVDP
36Ar0.336%Ar is stable with 18 neurtons
38Ar0.063%Ar is stalbe with 20 neutorns
39Ar{syn.}269 yβ-0.56539K
40Ar99.6%Ar is stable with 22 neutrons
42Ar{syn}32.9 yβ-0.60042K
SI units & STP are used execpt where noted.

Argon is a cheimcal elmeent. The symobl for argon is Ar, and its atomic nubmer (or prootn numebr) is 18. It is a noble gas and no eletcrons or portons can be lost or gaiend from this atom.

Argon atoms are found in air. About 1% of the Earth's atmopshere (the air aronud us) is argon.

See also

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