Mendeleev's Periodic Table > Ar - Argon

Ar - Argon

Argon is an inert gas used for its blue and green lumination of emission. Argonwas found by William Ramsey and Rayleigh in a 1894 experiment in which they removed all of the oxygen and nitrogen from the air.

Atomic number	-	18		Density	g/mL	0	.001784
Atomic weight	u	39	.948	Melting point	K	83	.81
Bonding radius	A	0	.98	Boiling point	K	87	.3
Atomic radius	A	0	.88	Heat of vaporization	kJ/mol	6	.447
Ionization Potential	V	15	.759	Heat of fusion	kJ/mol	1	.188
Electronegativity	-	-		Specific heat	J/gK	0	.52
The oxide is unknown.				Crystal are face centered cubic.
Electron config. : [Ne] 3s² 3p⁶

Isotopes of Ar (Argon):

MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	032 98 msec EC/ECp,11.150 Cl-32/S-31 31.997659	033 173.0 msec EC/ECp,11.620 Cl-33/S-32 32.989930	034 844.5 msec EC,6.061 MeV Cl-34 33.980270	035 1.775 sec EC,5.965 MeV Cl-35 34.975256
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	036 0.3365% Stable 35.967546	037 35.04 da EC,4.865 MeV Cl-37 36.966775	038 0.0632% Stable 37.962732	039 269 yr B-,3.442 MeV K-39 38.964313
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	040 99.6003% Stable 39.962383	041 109.34 min B-,2.492 MeV K-41 40.964500	042 32.9 yr B-,9.430 MeV K-42 41.963048	043 5.37 min B-,4.620 MeV K-43 42.965668
MASS abundancy Halflife Particle, Energy Decay Product(s) Isotopic Mass	044 11.87 min B-,3.550 MeV K-44 43.965365	045 21.48 sec B-,6.890 MeV K-45 44.968094	046 8.4 sec B-,5.700 MeV K-46 45.968094

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