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Atomic
Number:
Atomic Weight:
Element Type:
Crystal
Structure:
Melting Point:
Boiling Point:
Critical
Temp:
Atomic Radius:
Covalent Radius:
Electronegativity:
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54
131.3
Noble Gas
Cubic Face Centered
-111.75°C = -169.15°F = 161.4 K
-108.04°C = -162.472°F = 165.11 K
16.58°C = 61.844°F = 289.73 K
1.24 Å (Å = Angstrom = 10-10 m)
1.31 Å
2.6 |
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Discovery
(Gr. argos, inactive) Its presence in air was suspected
by Cavendish in 1785,discovered by Lord Rayleigh and Sir
William Ramsay in 1894.
Sources
Argon gas is prepared by fractionating liquid air. The
Earth's atmosphere contains 0.94% argon. Mars' atmosphere
contains 1.6% Argon-40 and 5 ppm Argon-36.
Uses
Argon is used in electric lights and in fluorescent tubes,
photo tubes, glow tubes, and in lasers. Argon is used as
an inert gas for welding and cutting, blanketing reactive
elements, and as a protective (nonreactive) atmosphere for
growing crystals of silicon and germanium.
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