ଛାଞ୍ଚ:Infobox argon

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Argon,  18Ar
Vial containing a violet glowing gas
Argon Spectrum.png
Spectral lines of argon
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକargon, Ar
Appearancecolorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
ଉଚ୍ଚାରଣ /ˈɑrɡɒn/
Argon in the periodic table
Hydrogen (other non-metal)
Helium (noble gas)
Lithium (alkali metal)
Beryllium (alkaline earth metal)
Boron (metalloid)
Carbon (other non-metal)
Nitrogen (other non-metal)
Oxygen (other non-metal)
Fluorine (halogen)
Neon (noble gas)
Sodium (alkali metal)
Magnesium (alkaline earth metal)
Aluminium (post-transition metal)
Silicon (metalloid)
Phosphorus (other non-metal)
Sulfur (other non-metal)
Chlorine (halogen)
Argon (noble gas)
Potassium (alkali metal)
Calcium (alkaline earth metal)
Scandium (transition metal)
Titanium (transition metal)
Vanadium (transition metal)
Chromium (transition metal)
Manganese (transition metal)
Iron (transition metal)
Cobalt (transition metal)
Nickel (transition metal)
Copper (transition metal)
Zinc (transition metal)
Gallium (post-transition metal)
Germanium (metalloid)
Arsenic (metalloid)
Selenium (other non-metal)
Bromine (halogen)
Krypton (noble gas)
Rubidium (alkali metal)
Strontium (alkaline earth metal)
Yttrium (transition metal)
Zirconium (transition metal)
Niobium (transition metal)
Molybdenum (transition metal)
Technetium (transition metal)
Ruthenium (transition metal)
Rhodium (transition metal)
Palladium (transition metal)
Silver (transition metal)
Cadmium (transition metal)
Indium (post-transition metal)
Tin (post-transition metal)
Antimony (metalloid)
Tellurium (metalloid)
Iodine (halogen)
Xenon (noble gas)
Caesium (alkali metal)
Barium (alkaline earth metal)
Lanthanum (lanthanoid)
Cerium (lanthanoid)
Praseodymium (lanthanoid)
Neodymium (lanthanoid)
Promethium (lanthanoid)
Samarium (lanthanoid)
Europium (lanthanoid)
Gadolinium (lanthanoid)
Terbium (lanthanoid)
Dysprosium (lanthanoid)
Holmium (lanthanoid)
Erbium (lanthanoid)
Thulium (lanthanoid)
Ytterbium (lanthanoid)
Lutetium (lanthanoid)
Hafnium (transition metal)
Tantalum (transition metal)
Tungsten (transition metal)
Rhenium (transition metal)
Osmium (transition metal)
Iridium (transition metal)
Platinum (transition metal)
Gold (transition metal)
Mercury (transition metal)
Thallium (post-transition metal)
Lead (post-transition metal)
Bismuth (post-transition metal)
Polonium (post-transition metal)
Astatine (halogen)
Radon (noble gas)
Francium (alkali metal)
Radium (alkaline earth metal)
Actinium (actinoid)
Thorium (actinoid)
Protactinium (actinoid)
Uranium (actinoid)
Neptunium (actinoid)
Plutonium (actinoid)
Americium (actinoid)
Curium (actinoid)
Berkelium (actinoid)
Californium (actinoid)
Einsteinium (actinoid)
Fermium (actinoid)
Mendelevium (actinoid)
Nobelium (actinoid)
Lawrencium (actinoid)
Rutherfordium (transition metal)
Dubnium (transition metal)
Seaborgium (transition metal)
Bohrium (transition metal)
Hassium (transition metal)
Meitnerium (unknown chemical properties)
Darmstadtium (unknown chemical properties)
Roentgenium (unknown chemical properties)
Copernicium (transition metal)
Ununtrium (unknown chemical properties)
Flerovium (unknown chemical properties)
Ununpentium (unknown chemical properties)
Livermorium (unknown chemical properties)
Ununseptium (unknown chemical properties)
Ununoctium (unknown chemical properties)


ପରମାଣୁ କ୍ରମାଙ୍କ (Z)18
ଶ୍ରେଣୀ, ବ୍ଳକgroup 18 (noble gases), p-block
ପର୍ଯ୍ୟାୟperiod 3
ମୌଳିକ ପ୍ରକାର  noble gas
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)39.948(1)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ[Ne] 3s2 3p6
per shell
2, 8, 8
ଭୌତିକ ଗୁଣ
ଗଳନାଙ୍କ83.80 K ​(−189.35 °C, ​−308.83 °F)
ସ୍ଫୁଟନାଙ୍କ87.30 K ​(−185.85 °C, ​−302.53 °F)
ଘନତା at stp (0 °C and 101.325 kPa)1.784 g/L
when liquid, at b.p.1.40 g/cm3
Triple point83.8058 K, ​69 kPa
Critical point150.87 K, 4.898 MPa
Heat of fusion1.18 kJ/mol
Heat of 6.43 kJ/mol
Molar heat capacity5R/2 = 20.786 J/(mol·K)
P (Pa) 1 10 100 1 k 10 k 100 k
at T (K)   47 53 61 71 87
Atomic properties
Oxidation states0
ElectronegativityPauling scale: no data
Covalent radius106±10 pm
Van der Waals radius188 pm
Crystal structureface-centered cubic (fcc)
Face-centered cubic crystal structure for argon
Speed of sound(gas, 27 °C) 323 m/s
Thermal conductivity17.72x10-3  W/(m·K)
Magnetic orderingdiamagnetic[୧]
CAS Number7440–37–1
ଆବିଷ୍କାରLord Rayleigh and William Ramsay (1894)
First isolationLord Rayleigh and William Ramsay (1894)
Most stable isotopes of argon
iso NA half-life DM DE (MeV) DP
36Ar 0.337% 36Ar is stable with 18 neutrons
37Ar syn 35 d ε 0.813 37Cl
38Ar 0.063% 38Ar is stable with 20 neutrons
39Ar trace 269 y β 0.565 39K
40Ar 99.600% 40Ar is stable with 22 neutrons
41Ar syn 109.34 min β 2.49 41K
42Ar syn 32.9 y β 0.600 42K
| references


  1. Magnetic susceptibility of the elements and inorganic compounds, in Handbook of Chemistry and Physics 81st edition, CRC press.