PERIODIC TABLE
Argon
Atomic No. 18
Ar
Argon
About Argon
Argon is a noble gas with atomic number 18 that is chemically unreactive under most industrial conditions. It protects welds and reactive metals such as titanium from unwanted reactions during processing. Argon is also used in discharge lamps and as an insulating gas between panes of double glazing.
Properties
- Atomic Number
- 18
- Atomic Symbol
- Ar
- Atomic Mass
- 39.948
- CAS No.
- 7440-37-1
- Density
- 1.784 g/l
- Series
- noble gas
- Melting Point
- -189.3°C
- Boiling Point
- -185.8°C
- Thermal Conductivity
- 0.01772 W/cm °C
- Heat of Fusion
- 1.18 kJ/mol
- Heat of Vaporization
- 6.5 kJ/mol
- Crystal Structure
- Cubic
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