Helium
- filling balloons (blimps) as it
is a much safer gas than hydrogen
- widely used as an inert gas
shield for arc welding in countries where helium is cheaper than argon
- protective gas in growing
silicon and germanium crystals, and in titanium and zirconium production
- cooling medium for nuclear
reactors
- a mixture of 80% helium and 20%
oxygen is used as an artificial atmosphere for divers and others working
under pressure
- cryogenic applications
- as a gas for supersonic wind
tunnels
- a protective gas for
semiconductor materials
- pressurizing liquid fuel
rockets
Neon
- used in making neon advertising
signs, which accounts for its largest use
- used to make high-voltage
indicators, lightning arrestors, wave meter tubes, and TV tubes
- neon and helium are used in
making gas lasers
- liquid neon is an economical
cryogenic refrigerant. It has over 40 times more refrigerating capacity
per unit volume than liquid helium and more than three times that of
liquid hydrogen. It is compact, inert, and less expensive than helium when
it meets refrigeration requirements
Argon
- used in electric light bulbs
and in fluorescent tubes at a pressure of about 3 mm, photo tubes, glow
tubes, etc.
- used as an inert gas shield for
arc welding and cutting
- blanket for the production of
titanium and other reactive elements
- protective atmosphere for
growing silicon and germanium crystals ,lasers, light bulbs electric light
bulbs and fluorescent tubes, photo tubes, glow tubes, welding, cutting, as
a protective gas for other substances,
Krypton
- used with argon as a
low-pressure filling gas for fluorescent lights
- used in some photographic flash
lamps for high-speed photography, lamps, UV-laser spectral line used for international
measurement of a metre
Xenon
- used in making electron tubes,
stroboscopic lamps, bactericidal lamps, and lamps used to excite ruby
lasers for generating coherent light
- used in the atomic energy field
in bubble chambers, probes, and other applications where its high
molecular weight is of value
- potentially useful as a gas for
ion engines
- the perxenates are used in
analytical chemistry as oxidizing agents
Radon
- occasional therapeutic use
- earthquake prediction
- radiation therapy in hospitals
Ununoctium
- Element 118 has no uses as only a very few atoms of this element have been identified.
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