Argon

Symbol ArAtomic number 18
Atomic mass
39.948
 Thermal conductivity
0.000177
Atomic radius
0.88
 Covalent radius
0.98
Density
0.001784
 Atomic volume
28.5
Melting point
83.95
 Oxidation states
...
Boiling point
87.30
 Stable isotopes
...
Heat of vapor.
6.447
 Electronegativity
...
Heat of fusion
1.188
 First ionization
15.759
Specific heat
0.52
 Electrical conduct.
...
Electron configuration

General descriptionNuclear data
 Index

Periodic Table

Chemistry concepts
 
HyperPhysicsR Nave
 Go Back





Argon

Argon is a noble gas which composes about 1% of the atmosphere. It is used in incandescent light bulbs to permit the filament to be heated to a higher temperature, and therefore to produce a whiter light than would be practical in a vacuum. The argon decreases the rate at which the tungsten filament evaporates by hindering the diffusion of the vaporized metal atoms away from the filament, increasing the probability that they will reattach to the filament.

Argon is used for producing gas lasers which produce green light.

Atomic dataNuclear data
 Index

Periodic Table

Chemistry concepts

Reference
Pauling
Ch. 5
 
HyperPhysicsR Nave
 Go Back







Argon Nuclear Data

Z
A
Atomic
Mass (u)
Nuclear
Mass(GeV/c2
Binding
Energy(MeV)
Spin
Natural
Abund.
Half-life
Decay
Q
MeV
18
36
35.967546
33.4946
306.72
0
0.00337
stable
...
...
18
38
37.962733
35.3531
327.35
0
0.00063
stable
...
...
18
39
38.964314
36.2861
333.95
7/2
...
268y
b-
0.57
18
40
39.962384
37.2158
343.81
0
0.996
stable
...
...
18
42
41.963049
39.0794
359.34
0
...
33y
b-
0.60
Atomic data
 Index

Periodic Table

Chemistry concepts

Reference
Rohlf
 
HyperPhysicsR Nave
 Go Back