Argon is a
typical non reactive gas, which is required in the places where
nitrogen is not found sufficiently inert or where low thermal
conductivity is required. The gas has heat isolating effect and is
used as inert gas in many forms of welding.
Chemical
Properties
• Atomic number -
18
• Atomic mass
- 39.948 g.mol -1
• Density -
1.78.10 -3 g.cm -3 at 0 °C
• Melting point -
-189 °C
• Boiling point -
-185.7 °C
• Vanderwaals
radius - 0.192 nm
•
Isotopes - 6
• Electronic
shell - [Ne] 3s23p6
• Energy of
first ionisation - 1520 kJ.mol -1
• Energy of
second ionisation - 2665.8 kJ.mol -1
• Energy of
third ionisation - 3931 kJ.mol -1
Application
Areas
• Metal
industry
• Manufacturing
of titanium
• Ground
water dating
• Used
in technical scuba diving to inflate the dry suit
