మూస:ఆర్గాన్ మూలకము

ఆర్గాన్, ₀₀Ar
ఆర్గాన్
Pronunciation	/ˈɑːrɡɒn/ (AR-gon)
Appearance	colorless gas exhibiting a lilac/violet glow when placed in a high voltage electric field
Standard atomic weight Ar°(Ar)
	[39.792, 39.963]; 39.95±0.16 (abridged);
ఆర్గాన్ in the periodic table
	క్లోరిన్ ← ఆర్గాన్ → పొటాషియం
Group	మూస:Infobox element/symbol-to-group/format
Period	period 3
Block	p-block
Electron configuration	[Ne] 3s2 3p6
Electrons per shell	2, 8, 8
Physical properties
Phase at STP	gas
Melting point	83.81 K (−189.34 °C, −308.81 °F)
Boiling point	87.302 K (−185.848 °C, −302.526 °F)
Density (at STP)	1.784 g/L
when liquid (at b.p.)	1.40 g/cm3
Triple point	83.8058 K, 68.89 kPa
Critical point	150.687 K, 4.863 MPa
Heat of fusion	1.18 kJ/mol
Heat of vaporization	6.43 kJ/mol
Molar heat capacity	5R/2 = 20.786 (Cp) J/(mol·K)
Atomic properties
Oxidation states	0
Electronegativity	Pauling scale: no data
Ionization energies	(more);
Covalent radius	106±10 pm
Van der Waals radius	188 pm
	Spectral lines of ఆర్గాన్
Other properties
Natural occurrence	primordial
Crystal structure	face-centered cubic (fcc)
Speed of sound	(gas, 27 °C) 323 m/s
Thermal conductivity	17.72×10−3 W/(m⋅K)
Magnetic ordering	diamagnetic
CAS Number	7440–37–1
History
Discovery	Lord Rayleigh and William Ramsay (1894)
First isolation	Lord Rayleigh and William Ramsay (1894)
Isotopes of ఆర్గాన్ v; e;
	Template:infobox ఆర్గాన్ isotopes does not exist
	Category: ఆర్గాన్; view; talk; edit; \| references

References

↑ "Standard Atomic Weights: Argon". CIAAW. 2017.
↑ Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.
↑ ^3.0 ^3.1 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.121. ISBN 1439855110.
↑ Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

[1] "Standard Atomic Weights: Argon". CIAAW. 2017.

[CIAAW2021-2] Prohaska, Thomas; Irrgeher, Johanna; Benefield, Jacqueline; et al. (2022-05-04). "Standard atomic weights of the elements 2021 (IUPAC Technical Report)". Pure and Applied Chemistry (in ఇంగ్లీష్). doi:10.1515/pac-2019-0603. ISSN 1365-3075.

[b92-3] 3.0 ^3.1 Haynes, William M., ed. (2011). CRC Handbook of Chemistry and Physics (92nd ed.). Boca Raton, FL: CRC Press. p. 4.121. ISBN 1439855110.

[4] Magnetic susceptibility of the elements and inorganic compounds, in Lide, D. R., ed. (2005). CRC Handbook of Chemistry and Physics (86th ed.). Boca Raton (FL): CRC Press. ISBN 0-8493-0486-5.

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