ଆର୍ଗନ

ଆର୍ଗନ (English: Argon) ହେଉଛି ଏକ ରାସାୟନିକ ମୌଳିକ ଯାହାର ପ୍ରତୀକ Ar ଓ ପରମାଣୁ କ୍ରମାଙ୍କ ୧୮ । ଏହା ଏକ ନିଷ୍କ୍ରିୟ ଗ୍ୟାସ ଓ ପର୍ଯ୍ୟାୟ ସାରଣୀର ୧୮ତମ ସ୍ତମ୍ବରେ ଅବସ୍ଥିତ ।

Argon,  ₁₈Ar

Spectral lines of argon
ସାଧାରଣ ଗୁଣ
ନାମ, ପ୍ରତୀକ	argon, Ar
Appearance	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
ଉଚ୍ଚାରଣ	/ˈɑːrɡɒn/
Argon in the periodic table
Ne ↑ Ar ↓ Kr chlorine ← argon → potassium
ପରମାଣୁ କ୍ରମାଙ୍କ (Z)	18
ଶ୍ରେଣୀ, ବ୍ଳକ	group 18 (noble gases), p-block
ପର୍ଯ୍ୟାୟ	period 3
ମୌଳିକ ପ୍ରକାର	noble gas
ମାନକ ପରମାଣବିକ ଓଜନ (±) (Ar)	39.948(1)
ଇଲେକ୍‌ଟ୍ରୋନ୍ ବିନ୍ୟାସ	[Ne] 3s2 3p6
per shell	2, 8, 8
ଭୌତିକ ଗୁଣ
ଅବସ୍ଥା	gas
ଗଳନାଙ୍କ	83.80 K ​(−189.35 °C, ​−308.83 °F)
ସ୍ଫୁଟନାଙ୍କ	87.30 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 point	83.8058 K, ​69 kPa
Critical point	150.87 K, 4.898 MPa
Heat of fusion	1.18 kJ/mol
Heat of	6.43 kJ/mol
Molar heat capacity	5R/2 = 20.786 J/(mol·K)
pressure P (Pa) 1 10 100 1 k 10 k 100 k at T (K)   47 53 61 71 87
Atomic properties
Oxidation states	0
Electronegativity	Pauling scale: no data
energies	(more)
Covalent radius	106±10 pm
Van der Waals radius	188 pm
Miscellanea
Crystal structure	​face-centered cubic (fcc)
Speed of sound	(gas, 27 °C) 323 m/s
Thermal conductivity	17.72x10-3  W/(m·K)
Magnetic ordering	diamagnetic
CAS Number	7440–37–1
ଇତିହାସ
ଆବିଷ୍କାର	Lord Rayleigh and William Ramsay (1894)
First isolation	Lord 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

ଉତ୍ପାଦନ

ଆହୁରି ପଢନ୍ତୁ

• Emsley, J., Nature's Building Blocks; Oxford University Press: Oxford, NY, 2001; pp. 35–39.
• Brown, T. L.; Bursten, B. E.; LeMay, H. E., In Chemistry: The Central Science, 10th ed.; Challice, J.; .; Folchetti, N. et al.; Eds.; Pearson Education, Inc.: Upper Saddle River, NJ, 2006; pp. 276 and 289.
• Triple point temperature: 83.8058 K – Preston-Thomas, H. (1990). "The International Temperature Scale of 1990 (ITS-90)". Metrologia. 27: 3–10. Bibcode:1990Metro..27....3P. doi:10.1088/0026-1394/27/1/002.
• Triple point pressure: 69 kPa – "Section 4, Properties of the Elements and Inorganic Compounds; Melting, boiling, triple, and critical temperatures of the elements". CRC Handbook of Chemistry and Physics (85th ed.). Boca Raton, Florida: CRC Press. 2005.

ବାହାର ଲିଙ୍କ

• Silicon at The Periodic Table of Videos (University of Nottingham)
• USGS Periodic Table – Argon
• Diving applications: Why Argon?